| 单词 | pulsar |
| 例句 | Perhaps the recipients will make nothing of it, or think it is a recording of a pulsar, which in some superficial sense it resembles. Cosmos 1980-01-01T00:00:00Z They pay almost no attention to all the moons and planets, asteroids and comets, quasars and pulsars, exploding galaxies, symbiotic stars, cataclysmic variables and X-ray sources that have been discovered since Ptolemy’s time. Cosmos 1980-01-01T00:00:00Z It is perhaps conceivable that a planet could survive the evolution of a star into a pulsar; or a planet could be captured at a later time. Cosmos 1980-01-01T00:00:00Z Blinking and ticking like a cosmic metronome, pulsars keep far better time than the most accurate ordinary clock. Cosmos 1980-01-01T00:00:00Z This is the reason it is called a pulsar. Cosmos 1980-01-01T00:00:00Z I was one tiny pulsar in a swirling, luminous galaxy of Iranians, held together by the gravity of thousands of years of culture and heritage. Darius the Great Is Not Okay 2018-08-28T00:00:00Z It was a man from the Daily Telegraph who coined the term pulsar. Beautiful Minds and Celebrity Roast 2010-04-07T23:05:00Z I'm not going to pretend I now know what a pulsar is exactly, but anything Bell Burnell can describe, I could probably name. Beautiful Minds and Celebrity Roast 2010-04-07T23:05:00Z The pulsar image, as ably summarized for us dummies in Scientific American by Jen Christiansen, is a data visualization that “shows a series of radio frequency periods from the first pulsar discovered.” How Joy Division’s ‘Unknown Pleasures’ image went from underground album cover to a piece of cultural ubiquity 2019-06-14T04:00:00Z When she was a PhD student she discovered the pulsar, a phenomenon linked to supernova explosions, which changed the way we think about the universe. Waterloo Road 2010-04-06T23:05:00Z Lovell was primarily concerned with investigating cosmic rays, and the observatory has since played a key role in the research of meteors, quasars and pulsars. Doves: "The band are splitting up? Nobody told me!" | Interview 2010-04-03T23:07:00Z The opening title track builds on showers of shimmery piano, watery bass, and pulsar guitar effects, the world beginning to drift and sway in uncertainty. Moonface's Heartbreaking Bravery: Love Hurts, But It Sure Sounds Good 2012-04-18T10:44:59Z At the cloud’s center, almost shrouded by the debris, is a pinpoint of light: a pulsar, the leftover core of the massive star that exploded so long ago. See JWST’s Spectacular New View of the Crab Nebula 2023-11-10T05:00:00Z This feature is a product of the nebula's pulsar, a rapidly rotating neutron star. The Crab Nebula seen in new light by NASA's Webb 2023-10-30T04:00:00Z The answer is: in regions surrounding rotating neutron stars also known as pulsars. Pulsars may make dark matter glow 2023-10-06T04:00:00Z A pulsar is the least sunlike kind of star out there, and we, as irredeemably self-centered human beings, prefer to find places more like home—planets around stars more like our own. The Sky Is Full of Stars—and Exoplanets, Too 2023-10-06T04:00:00Z The so-called Vela pulsar, which is about 1,000 light years away and can be observed from the Southern hemisphere, has the brightest gamma-ray emission of any pulsar known. Vera pulsar pouring out 200 times more energy than thought possible, scientists discover 2023-10-05T04:00:00Z And its image mostly reveals shock waves rippling through the cloud’s material and hot gas excited by the central pulsar’s powerful radiation. See JWST’s Spectacular New View of the Crab Nebula 2023-11-10T05:00:00Z The pulsar's strong magnetic field accelerates particles to extremely high speeds and causes them to emit radiation as they wind around magnetic field lines. The Crab Nebula seen in new light by NASA's Webb 2023-10-30T04:00:00Z These pulsars -- short for 'pulsating stars' -- are dense objects, with a mass roughly the same as that of our Sun, but a radius that is around 100,000 times smaller, only about 10 km. Pulsars may make dark matter glow 2023-10-06T04:00:00Z Scientists using the H.E.S.S. observatory in Namibia have detected the highest energy gamma rays ever from a dead star called a pulsar. Scientists discover the highest energy gamma-rays ever from a pulsar 2023-10-05T04:00:00Z A new study published in Nature Astronomy today found the amount of energy the Vela pulsar puts out is far greater than once thought. Vera pulsar pouring out 200 times more energy than thought possible, scientists discover 2023-10-05T04:00:00Z Its whirling magnetic fields sweep up matter and blast it outward in two beams like that of a lighthouse, creating a pulsar. See JWST’s Spectacular New View of the Crab Nebula 2023-11-10T05:00:00Z To locate the Crab Nebula's pulsar heart, trace the wisps that follow a circular ripple-like pattern in the middle to the bright white dot in the center. The Crab Nebula seen in new light by NASA's Webb 2023-10-30T04:00:00Z Being so small, pulsars spin with enormous frequencies, emitting bright narrow beams of radio emission along their axis of rotation. Pulsars may make dark matter glow 2023-10-06T04:00:00Z Scientists think that the source of this radiation are fast electrons produced and accelerated in the pulsar's magnetosphere, while traveling towards its periphery. Scientists discover the highest energy gamma-rays ever from a pulsar 2023-10-05T04:00:00Z But over time, this pulsar stopped pulsating light and began flashing on and off like a light switch instead. Scientists just solved the riddle of a dead star that burps ultra-hot "cosmic cannonballs" of matter 2023-08-30T04:00:00Z The Crab nebula has a pulsar, indicating that the core of its supernova progenitor was less than 2.8 times the mass of the sun. See JWST’s Spectacular New View of the Crab Nebula 2023-11-10T05:00:00Z The curvy wisps are closely grouped together, outlining the structure of the pulsar's magnetic field, which sculpts and shapes the nebula. The Crab Nebula seen in new light by NASA's Webb 2023-10-30T04:00:00Z Similar to a lighthouse, the pulsar's beams can sweep across the Earth, making the pulsating star easily observable. Pulsars may make dark matter glow 2023-10-06T04:00:00Z However, above a few GeV, its radiation ends abruptly, presumably because the electrons reach the end of the pulsar's magnetosphere and escape from it. Scientists discover the highest energy gamma-rays ever from a pulsar 2023-10-05T04:00:00Z The pulsar is in the "high" mode about 70% of the time, with each "low" mode lasting anywhere between 30 seconds to many minutes. Scientists just solved the riddle of a dead star that burps ultra-hot "cosmic cannonballs" of matter 2023-08-30T04:00:00Z The mass of the Crab pulsar is less than twice the sun’s mass, and the estimated mass of the entire nebula is as much as five times that of the sun. See JWST’s Spectacular New View of the Crab Nebula 2023-11-10T05:00:00Z The wind produced by the pulsar heart continues to push the shell of gas and dust outward at a rapid pace. The Crab Nebula seen in new light by NASA's Webb 2023-10-30T04:00:00Z That, in turn, could mean that pulsars are very efficient axion factories. Pulsars may make dark matter glow 2023-10-06T04:00:00Z Whatever the explanation, next to its other superlatives, the Vela pulsar now officially holds the record as the pulsar with the highest-energy gamma rays discovered to date. Scientists discover the highest energy gamma-rays ever from a pulsar 2023-10-05T04:00:00Z Over time, this pulsar stopped pulsating light and began flashing on and off like a light switch instead. Scientists just solved the riddle of a dead star that burps ultra-hot "cosmic cannonballs" of matter 2023-08-30T04:00:00Z It’s possible there’s hidden mass surrounding the pulsar, embedded in the nebula, as yet undetected by telescopes. See JWST’s Spectacular New View of the Crab Nebula 2023-11-10T05:00:00Z For the type of waves coming from the spiralling supermassive black holes, the pulsar approach is picking up the ripples produced in the billions of years before the final union. Scientists pick up shock waves from colliding galaxies 2023-06-28T04:00:00Z Because of the strong electromagnetic field around the pulsar, a fraction of these axions could convert into observable light. Pulsars may make dark matter glow 2023-10-06T04:00:00Z Such waves slightly shrink or expand the intervening space between our planet and the targeted pulsars, creating telltale offsets in the arrival times of pulses. A Background ‘Hum’ Pervades the Universe. Scientists Are Racing to Find Its Source 2023-08-04T04:00:00Z Because the pulsar observed is rotating so fast and is so magnetic, it generates particles that move nearly at the speed of light. Scientists just solved the riddle of a dead star that burps ultra-hot "cosmic cannonballs" of matter 2023-08-30T04:00:00Z The latter is the eerie glow emitted by trapped electrons spiraling at nearly the speed of light around the pulsar’s intense magnetic field lines. See JWST’s Spectacular New View of the Crab Nebula 2023-11-10T05:00:00Z Each record is encased in a sleeve that maps Earth’s location with respect to 14 pulsars, which are rotating neutron stars that pulse radiation at very precise intervals. NASA Detects 'Heartbeat' from Voyager 2 Spacecraft after Losing Contact 2023-08-01T04:00:00Z Just look at pulsars, see if they emit extra light, and if they do, determine whether this extra light could be coming from axions. Pulsars may make dark matter glow 2023-10-06T04:00:00Z The evidence for a background hum of low-frequency gravitational waves comes from a total of 115 pulsars that were observed across many years by the multiple teams. A Background ‘Hum’ Pervades the Universe. Scientists Are Racing to Find Its Source 2023-08-04T04:00:00Z When enough matter collects around the pulsar from its neighboring star, these charged particles heat the matter up and burst out, causing the pulsar to brighten in its high mode. Scientists just solved the riddle of a dead star that burps ultra-hot "cosmic cannonballs" of matter 2023-08-30T04:00:00Z She was detecting something that had never been seen before: a special kind of neutron star called a pulsar, which flashes beams of radiation at regular intervals as it spins, like a lighthouse. Ultracold Gases Can Probe Neutron Star Guts 2023-07-18T04:00:00Z While at Oxford, he had the opportunity to attend a talk by Dame Jocelyn Bell-Burnell who discovered pulsars while a grad student at Cambridge. Northern Ireland scientist's role in black hole shockwaves find 2023-07-02T04:00:00Z This allowed the researchers to quantitatively understand the subsequent production of radio waves and model how this process would provide an additional radio signal on top of the intrinsic emission generated from the pulsar itself. Pulsars may make dark matter glow 2023-10-06T04:00:00Z So far, the potential hotspots seem to correlate with regions of the sky where fewer pulsars have been used in the data sets, meaning the anisotropy may simply be a miragelike artifact of data collection. A Background ‘Hum’ Pervades the Universe. Scientists Are Racing to Find Its Source 2023-08-04T04:00:00Z Eventually, jet propulsions and strong winds from within the pulsar eject the heated matter like cosmic cannonballs. Scientists just solved the riddle of a dead star that burps ultra-hot "cosmic cannonballs" of matter 2023-08-30T04:00:00Z In particular, Graber and other scientists are hoping to find clues to one of the biggest mysteries, called pulsar glitches. Ultracold Gases Can Probe Neutron Star Guts 2023-07-18T04:00:00Z His team have been studying the signals which are omitted by pulsars and the affects of gravitational waves on their frequencies. Northern Ireland scientist's role in black hole shockwaves find 2023-07-02T04:00:00Z Using observations from 27 nearby pulsars, the researchers compared the observed radio waves to the models, to see if any measured excess could provide evidence for the existence of axions. Pulsars may make dark matter glow 2023-10-06T04:00:00Z Other hunts for gravitational waves will compliment pulsar timing arrays. A Background ‘Hum’ Pervades the Universe. Scientists Are Racing to Find Its Source 2023-08-04T04:00:00Z When enough matter collects around the pulsar from its neighboring star, these charged particles heat the matter up and burst out, causing the pulsar to brighten. Scientists just solved the riddle of a dead star that burps ultra-hot "cosmic cannonballs" of matter 2023-08-30T04:00:00Z Generally, the regularly timed ticking of a pulsar “clock” is so reliable that its accuracy rivals that of atomic clocks. Ultracold Gases Can Probe Neutron Star Guts 2023-07-18T04:00:00Z Dr Taylor described the radio beams from pulsars as being like light beams from a lighthouse. Northern Ireland scientist's role in black hole shockwaves find 2023-07-02T04:00:00Z The first comparison between simulations and actual pulsars has placed the strongest limits to date on the interaction that axions can have with light. Pulsars may make dark matter glow 2023-10-06T04:00:00Z “That is going to be the most sensitive pulsar timing array data set that’s ever been put together,” says Nihan Pol of Vanderbilt University. A Background ‘Hum’ Pervades the Universe. Scientists Are Racing to Find Its Source 2023-08-04T04:00:00Z "The collision of high-energy charged particles from the pulsar wind with the inflowing matter in the disc increases the ionization level of the disc," the authors wrote. Scientists just solved the riddle of a dead star that burps ultra-hot "cosmic cannonballs" of matter 2023-08-30T04:00:00Z But not always: Sometimes, the pulsar’s rate of rotation increases abruptly, causing a glitch. Ultracold Gases Can Probe Neutron Star Guts 2023-07-18T04:00:00Z Together, they observed pulsars which are the ultra-dense remnants of massive supernova stars. Scientists 'hear' gravitational wave hum 2023-06-29T04:00:00Z For the type of waves coming from the inspiralling supermassive black holes, the pulsar approach is picking up the ripples produced in the billions of years before the final union. Scientists pick up shock waves from colliding galaxies 2023-06-28T04:00:00Z Currently, the next-best radio telescope for pulsar timing is MeerKAT, a collection of 64 dishes in South Africa, which will have its own data added to the IPTA’s current efforts. A Background ‘Hum’ Pervades the Universe. Scientists Are Racing to Find Its Source 2023-08-04T04:00:00Z "As a result, the inflowing matter is drawn into the pulsar magnetic field and accelerated, producing a compact jet of plasma that streams out along the direction of the pulsar magnetic field lines." Scientists just solved the riddle of a dead star that burps ultra-hot "cosmic cannonballs" of matter 2023-08-30T04:00:00Z Forbes and others suspect that the glitches they observe in the rotation of pulsars have something to do with how these vortices get “pinned” to structures in the star. Ultracold Gases Can Probe Neutron Star Guts 2023-07-18T04:00:00Z Vigeland described the pulsars as "clocks" that are spread throughout the galaxy. Scientists 'hear' gravitational wave hum 2023-06-29T04:00:00Z NANOGrav is just one of several different pulsar timing array projects underway around the globe. Scientists Thrill at First Hints of Cosmic ‘Hum’ from Giant Gravitational Waves 2023-06-28T04:00:00Z A quarter of its time is set to be dedicated to NANOGrav’s pulsar timing observations. A Background ‘Hum’ Pervades the Universe. Scientists Are Racing to Find Its Source 2023-08-04T04:00:00Z In 2020, after more than 12 years of gathering data, the NANOGrav team released results from monitoring the timing of 45 pulsars. The Cosmos Is Thrumming With Gravitational Waves, Astronomers Find 2023-06-28T04:00:00Z The scientists pointed telescopes at dead stars called pulsars, which send out flashes of radio waves as they spin around in space like lighthouses. Scientists have finally ‘heard’ the chorus of gravitational waves that ripple through the universe 2023-06-28T04:00:00Z Usually you have a source—a neutron star or a black hole or a pulsar, for example—that accelerates particles. Strange Giant Filaments Reveal a Mystery at the Milky Way’s Heart 2023-06-22T04:00:00Z All these endeavors follow the same basic blueprint: they use radio telescopes to monitor dozens of superpredictable pulsars for years on end to catch tiny variations in their rhythmic spinning. Scientists Thrill at First Hints of Cosmic ‘Hum’ from Giant Gravitational Waves 2023-06-28T04:00:00Z By gathering and comparing the timings of more and more pulsars, they hope to start building a more detailed map of this background noise on the sky. A Background ‘Hum’ Pervades the Universe. Scientists Are Racing to Find Its Source 2023-08-04T04:00:00Z The NANOGrav team has the largest data set, with 15 years of measurements from 67 pulsars, each monitored for at least three years. The Cosmos Is Thrumming With Gravitational Waves, Astronomers Find 2023-06-28T04:00:00Z But as gravitational waves warp the fabric of spacetime, they actually change the distance between Earth and these pulsars, throwing off that steady beat. Scientists have finally ‘heard’ the chorus of gravitational waves that ripple through the universe 2023-06-28T04:00:00Z A passing gravitational wave would slightly shift a pulsar’s repetition rate as it ripples space between the pulsar and Earth. Giant array of low-cost telescopes could speed hunt for radio bursts, massive black holes 2023-03-31T04:00:00Z “So we know when there’s something happening, something at play that’s causing the pulsars to tick a little bit off-time”—something like gravitational waves stretching and shrinking the space between Earth and each pulsar. Scientists Thrill at First Hints of Cosmic ‘Hum’ from Giant Gravitational Waves 2023-06-28T04:00:00Z The telescope helped radio astronomers win a Nobel Prize in Physics for their observations of a pair of pulsars emitting gravitational waves, the ripples in space-time that had been predicted by Einstein. Requiem for a Telescope 2022-10-28T04:00:00Z “This is something that the community has been anticipating for quite a while,” she said, adding that independent measurements from other pulsar timing collaborations strengthened the findings. The Cosmos Is Thrumming With Gravitational Waves, Astronomers Find 2023-06-28T04:00:00Z By analyzing tiny changes in the ticking rate across different pulsars — with some pulses coming slightly early and others coming late — scientists could tell that gravitational waves were passing through. Scientists have finally ‘heard’ the chorus of gravitational waves that ripple through the universe 2023-06-28T04:00:00Z More than a decade of watching several dozen pulsars has yet to turn up a firm detection. Giant array of low-cost telescopes could speed hunt for radio bursts, massive black holes 2023-03-31T04:00:00Z Although pulsar timing arrays don’t require extremely specialized detectors, they do require patience. Scientists Thrill at First Hints of Cosmic ‘Hum’ from Giant Gravitational Waves 2023-06-28T04:00:00Z We call these pulsars, which are very useful for making predictions in astronomy. This star could be a bizarre "strange star" made of matter that shouldn't exist 2022-10-27T04:00:00Z The NANOGrav team is already working on analyzing all the data from gravitational-wave collaborations around the world, equaling around 25 years’ worth of measurements from 115 pulsars. The Cosmos Is Thrumming With Gravitational Waves, Astronomers Find 2023-06-28T04:00:00Z The NANOGrav team monitored 68 pulsars across the sky using the Green Bank Telescope in West Virginia, the Arecibo telescope in Puerto Rico and the Very Large Array in New Mexico. Scientists have finally ‘heard’ the chorus of gravitational waves that ripple through the universe 2023-06-28T04:00:00Z One review said Arecibo’s ability to discover new pulsars had been unmatched. Hopes for rebuilding giant Arecibo telescope appear dead 2022-10-18T04:00:00Z In order to sort out the signal’s sources, scientists will need to spend even more time watching even more pulsars. Scientists Thrill at First Hints of Cosmic ‘Hum’ from Giant Gravitational Waves 2023-06-28T04:00:00Z In that capacity he coined in 1968 the word pulsar, for the enigmatic beeping objects being discovered in the radio sky. Frank Drake, Who Led Search for Life on Other Planets, Dies at 92 2022-09-05T04:00:00Z The pulse periods of different pulsars range from a little longer than 1/1000 of a second to nearly 10 seconds. Astronomy 2016-10-13T00:00:00Z Other teams found similar evidence from dozens of other pulsars, monitored with telescopes across the globe. Scientists have finally ‘heard’ the chorus of gravitational waves that ripple through the universe 2023-06-28T04:00:00Z A percussive rhythm was created from a recording of a pulsar - a spinning neutron star. Giant Lovell radio telescope at Jodrell Bank to become space light show 2022-07-23T04:00:00Z Whatever the source, the most important task will be to gather more and better data about more pulsars, which will help pin down the gravitational waves that are invisibly rippling through the universe. Scientists Thrill at First Hints of Cosmic ‘Hum’ from Giant Gravitational Waves 2023-06-28T04:00:00Z This background is the unexplained excess that remains once the contributions from all known astrophysical sources, such as pulsars and matter-slurping supermassive black holes, are subtracted. Astronomers Might See Dark Matter by Staring into the Void 2022-06-08T04:00:00Z At first, the pulsars seemed particularly mysterious because nothing could be seen at their location on visible-light photographs. Astronomy 2016-10-13T00:00:00Z Astronomers have confirmed that an object they thought was a distant galaxy is actually the brightest extra-galactic pulsar ever seen. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z It turned out that what he observed was a supernova remnant and pulsar wind nebula, but the crab image clearly left a lasting impression. The Hubble telescope turns 32: Here are some of its greatest hits 2022-04-23T04:00:00Z On Earth, astronomers see flashes hundreds of times a second from some pulsars, arriving as regularly as the ticks of an atomic clock. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z Objects such as Cassiopeia A are just the beginning: This year alone, the telescope will study 40 celestial objects, including the Vela pulsar and the Centaurus A galaxy. New NASA mission sheds light on supernova 2022-02-20T05:00:00Z The energy from the Crab Nebula pulsar arrives in sharp bursts that occur 30 times each second—with a regularity that would be the envy of a Swiss watchmaker. Astronomy 2016-10-13T00:00:00Z The team made the discovery using a technique that blocks a particular type of polarized light, similar to polarized sunglasses, which could be used to spy more ‘hidden’ pulsars. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z Neutron stars including pulsars are among the universe's densest objects. Scientists amazed by blinking star's 'totally unexpected' behavior 2022-01-27T05:00:00Z They searched through 12.5 years of Fermi’s archive for gamma ray photons from about 30 suitable pulsars. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z Polarized beams are born in the extremes of the universe, and the direction of the light can help researchers understand more about the origin and properties of phenomena such as pulsars and black holes. New NASA mission sheds light on supernova 2022-02-20T05:00:00Z This is just the sort of time period we observe between pulsar pulses. Astronomy 2016-10-13T00:00:00Z As pulsars spin, they release a stream of radio waves from their poles — a ‘pulse’ that can be detected using radio telescopes. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z To detect the spiraling pairs, observers train large radio telescopes on dozens of pulsars—collapsed stars emitting radio beams that, as the pulsar spins, appear as pulses with clocklike regularity. More than a virus: Science’s areas to watch in 2022 2021-12-22T05:00:00Z Unlike the radio PTAs, which must target specific pulsars for brief windows of time, Fermi constantly watches a large swath of the sky, so several pulsars are almost always in view. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z The stars, collapsed stellar remnants made of tightly packed neutrons, are called pulsars because as they spin, they emit radio beams that sweep past Earth like a lighthouse. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z The masses are found using Kepler’s law for those few pulsars that are members of binary star systems. Astronomy 2016-10-13T00:00:00Z Wang and the team say the pulsar is ten times brighter than any other pulsar found outside the Milky Way. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z Tiny variations in the beats would signal passing gravitational waves that stretch the space between the pulsars and Earth. More than a virus: Science’s areas to watch in 2022 2021-12-22T05:00:00Z But gamma rays get a free pass, and by comparing pulsar signals from radio and gamma rays, researchers can better understand the interstellar noise, and potentially identify the fingerprint of gravitational waves. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z The fact that the team just kept on observing the pulsars month after month, for years, without publishing any results became a running joke among colleagues. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z The pulsar beams are a power source that “light up” the nebula long after the initial explosion of the star that made it. Astronomy 2016-10-13T00:00:00Z “Because of its unusual properties, this pulsar was missed by previous studies, despite how bright it is,” said co-author, Tara Murphy, a radio astronomer at the University of Sydney in Australia, in a press release. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z The polarimetry of the light emanating from the pulsar has been measured before but not in this detail. NASA Launches IXPE, a New X-Ray Space Telescope 2021-12-10T05:00:00Z Instead of using lasers and vacuum tubes, radio astronomers turn to pulsars, neutron stars that spew radiation from their poles. Astronomers find a new way to detect gravitational waves 2022-04-06T04:00:00Z But the double pulsar observations seemed to deviate from those basic models. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z As its rotational energy is used to excite the Crab Nebula year after year, the pulsar inside the nebula slows down. Astronomy 2016-10-13T00:00:00Z But in the case of PSR J0523−7125, its pulse is so wide and bright, that it didn’t fit the typical profile of a pulsar and was dismissed as a galaxy. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z Weisskopf says rival theories of beam generation suggest the x-rays originate in different locations on the pulsar: all across its surface, at its poles, or in its atmosphere. NASA telescope to study how extreme cosmic objects sculpt x-ray light 2021-12-02T05:00:00Z The instrument monitors pulsars, left behind by supernova explosions, using them to hunt for gravitational waves. Book review: The mirage of a town without cellphones 2021-10-09T04:00:00Z But the double pulsar results only make it harder to conjure up “other theories consistent with the data,” says team member Thibault Damour of the Institute for Advanced Scientific Studies near Paris. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z Several decades of careful observations have now shown that the Crab Nebula pulsar is not a perfectly regular clock as we originally thought: instead, it is gradually slowing down. Astronomy 2016-10-13T00:00:00Z Astronomers use pulsars to test theories of gravity and to look for evidence of gravitational waves. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z Also in the mission’s sights are magnetars, stellar remnants like pulsars, but with even more powerful magnetic fields, 100 million times stronger than any magnet made on Earth. NASA telescope to study how extreme cosmic objects sculpt x-ray light 2021-12-02T05:00:00Z By 1993, when a Nobel Prize was awarded to pulsar researchers for a second time, that practice had apparently changed. Antony Hewish, astronomer who won Nobel Prize for the discovery of pulsars, dies at 97 2021-09-17T04:00:00Z In addition to the relativity tests, the double pulsar may offer a window into the interiors of pulsars. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z To the satisfaction of astronomers, the rotational energy lost by the pulsar turns out to be the same as the amount of energy emerging from the nebula surrounding it. Astronomy 2016-10-13T00:00:00Z Emissions from pulsars are often highly polarized, and some of them oscillate in a circular way. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z A leading astrophysicist from Northern Ireland has been awarded the world's oldest scientific prize for her work on the discovery of pulsars. Dame Jocelyn Bell-Burnell: NI scientist awarded Royal Society's highest prize 2021-08-24T04:00:00Z Dr. Hewish was associated with Cambridge for his entire scientific career, and was working at the school’s Mullard Radio Astronomy Observatory when he and his research team detected the first pulsars in 1967. Antony Hewish, astronomer who won Nobel Prize for the discovery of pulsars, dies at 97 2021-09-17T04:00:00Z To understand the behavior of the densely packed neutrons, researchers need to know the pulsar density. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z As a given pulsar’s beam sweeps over a circle in space, there is absolutely no guarantee that this circle will include the direction of Earth. Astronomy 2016-10-13T00:00:00Z Using a computer programme, the team was able to block out wavelengths of light that were not circularly polarized, revealing the rare type of pulsar. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z "I reckon that my discovery of the pulsars came about because I was suffering imposter syndrome," she told BBC News NI in 2020. Dame Jocelyn Bell-Burnell: NI scientist awarded Royal Society's highest prize 2021-08-24T04:00:00Z Most pulsars are now understood to be neutron stars, the extraordinarily dense husks of collapsed supergiants. Antony Hewish, astronomer who won Nobel Prize for the discovery of pulsars, dies at 97 2021-09-17T04:00:00Z If observers can tease out a subtle coupling between one of the pulsars’ spin and its orbit, that will provide a way to calculate its radius. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z At least some supernovae leave behind a highly magnetic, rapidly rotating neutron star, which can be observed as a pulsar if its beam of escaping particles and focused radiation is pointing toward us. Astronomy 2016-10-13T00:00:00Z “We should expect to find more pulsars using this technique. This is the first time we have been able to search for a pulsar’s polarization in a systematic and routine way,” said Murphy. A Galaxy Is Unmasked as a Pulsar — the Brightest outside the Milky Way 2022-05-04T04:00:00Z “But the pulsar is just about the size of our largest collider,” Cao says. Highest-Energy Particles Yet Arrive from Ancient Crab Nebula 2021-07-08T04:00:00Z They were honored in 1974 for what the committee described as “their pioneering research in radio astrophysics,” with Dr. Hewish cited for playing a “decisive role in the discovery of pulsars.” Antony Hewish, astronomer who won Nobel Prize for the discovery of pulsars, dies at 97 2021-09-17T04:00:00Z Ransom says he had hoped the double pulsar researchers might be able to pin down this number—“a holy grail,” he says—but they were only able to set size limits. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z As pulsars age, they lose energy, their rotations slow, and their periods increase. Astronomy 2016-10-13T00:00:00Z Arecibo had a long and storied legacy of scientific discovery, studying space weather, searching for extraterrestrials, timing pulsars, mapping neutral hydrogen gas. Are We Doing Enough to Protect Earth from Asteroids? 2021-05-27T04:00:00Z Born in the supernova explosion observed nearly 1,000 years ago, the nebula’s heart harbors a pulsar, an extremely dense neutron star spinning 30 times every second. Highest-Energy Particles Yet Arrive from Ancient Crab Nebula 2021-07-08T04:00:00Z She helped build the radio telescope, operated the instruments, analyzed the data and identified the first pulsars, for which she was later honored with the 2018 Special Breakthrough Prize in Fundamental Physics. Antony Hewish, astronomer who won Nobel Prize for the discovery of pulsars, dies at 97 2021-09-17T04:00:00Z Ransom points out that in pulsar studies, the longer you observe, the better accuracy you achieve. Double pulsar data helps Einstein’s theory of gravity pass toughest test yet 2021-12-14T05:00:00Z Transfer of material and angular momentum can speed up the rotation of pulsars until their periods are just a few thousandths of a second. Astronomy 2016-10-13T00:00:00Z Those fields power pulsars, which sweep a radio beam past Earth at regular intervals as they spin. Nature’s most magnetic objects, ripped apart in starquakes, can unleash powerful flashes of light 2021-04-08T04:00:00Z It was until recently the world’s largest radio telescope and was used to study pulsars, detect gravitational waves, search for neutral hydrogen and detect habitable planets, among other things. Officials seeking answers to Puerto Rico telescope collapse 2021-03-05T05:00:00Z It does so by focusing on objects known as millisecond pulsars, which arise when massive stars explode as supernovas and leave behind their rapidly spinning remnant hearts. Galaxy-Size Gravitational-Wave Detector Hints at Exotic Physics 2021-02-03T05:00:00Z The beefed-up scope won a starring role in the NANOGrav project, which in 2007 began to monitor pulsar beats for fluctuations caused by passing gravitational waves. How the famed Arecibo telescope fell—and how it might rise again 2021-01-14T05:00:00Z Review of recent ideas and observations of pulsars. Astronomy 2016-10-13T00:00:00Z Newer players able to study pulsars—such as China’s FAST, South Africa’s MeerKAT and India’s Giant Metrewave Radio Telescope—are all capable of helping. Arecibo’s Collapse Sends Dire Warning to Other Aging Observatories 2020-12-11T05:00:00Z A number of cosmic phenomena such as pulsars - magnetised, rotating stars - show emission at radio wavelengths. Iconic Puerto Rico telescope to be dismantled amid collapse fears 2020-11-19T05:00:00Z Should a distortion in the fabric of spacetime come between our planet and a pulsar, it can cause this signal to arrive slightly earlier or later than expected. Galaxy-Size Gravitational-Wave Detector Hints at Exotic Physics 2021-02-03T05:00:00Z If radio astronomers could discover a pulsar in a similar orbit, its steady clock would allow them to study the behemoth’s gravitational field in fine detail. How the famed Arecibo telescope fell—and how it might rise again 2021-01-14T05:00:00Z How might you expect such signals to differ from pulsar signals? Astronomy 2016-10-13T00:00:00Z “For pulsars, the location where you want to see is in the Southern Hemisphere because the center of our galaxy is in the Southern Hemisphere. And there, the sky is full of pulsars,” he says. Arecibo’s Collapse Sends Dire Warning to Other Aging Observatories 2020-12-11T05:00:00Z Among them: observing molecules of life, detecting radio emission of stars and conducting pulsar work. Cable failures endanger renowned Puerto Rico radio telescope 2020-11-15T05:00:00Z But NANOGrav has been monitoring the light from 45 pulsars scattered over thousands of light-years for more than 12.5 years, looking for correlations between their arrival times that could indicate the presence of gravitational waves. Galaxy-Size Gravitational-Wave Detector Hints at Exotic Physics 2021-02-03T05:00:00Z A pulsar is a rapidly rotating neutron star that emits a radio-frequency beam that sweeps through space like a lighthouse beacon. The Pulsar Chart That Became a Pop Icon Turns 50: Joy Division’s Unknown Pleasures 2020-09-18T04:00:00Z If the formation of a neutron star leads to a supernova explosion, explain why only three of the hundreds of known pulsars are found in supernova remnants. Astronomy 2016-10-13T00:00:00Z One event was of special astrophysical interest because it signaled the merger of two pulsars. How Astronomers Revolutionized Our View of the Cosmos 2020-09-01T04:00:00Z Employing the antenna’s exquisite sensitivity, they tuned in to the enigmatic clockwork blips of distant pulsars, discerning in their changing rhythms secrets of unworldly physics. A Rip in the Fabric of Interstellar Dreams 2020-08-21T04:00:00Z Last September, the collaboration posted a paper to the preprint server arXiv.com, which hosts scientific articles that have yet to go through peer review, showing that their monitored pulsars all displayed similar blips. Galaxy-Size Gravitational-Wave Detector Hints at Exotic Physics 2021-02-03T05:00:00Z A stacked series of jagged lines displayed incoming radio waves from pulsar CP1919, as detected at Arecibo Observatory in Puerto Rico. The Pulsar Chart That Became a Pop Icon Turns 50: Joy Division’s Unknown Pleasures 2020-09-18T04:00:00Z Describe the evolution of a pulsar over time, in particular how the rotation and pulse signal changes over time. Astronomy 2016-10-13T00:00:00Z Yet since FRBs originate at a distance that is 100,000 times bigger, the intrinsic radio power of FRB sources is 10 billion times greater than that of a typical pulsar. An Audacious Explanation for Fast Radio Bursts 2020-06-24T04:00:00Z Further investigation revealed that the pulsar was orbited by three planets — the first planets ever discovered orbiting a star other than the sun. A Rip in the Fabric of Interstellar Dreams 2020-08-21T04:00:00Z A pulsar’s strong magnetic field can create a beam of radiation that swings around, repeatedly sweeping past the Earth with a regularity that rivals the accuracy of atomic clocks. Galaxy-Size Gravitational-Wave Detector Hints at Exotic Physics 2021-02-03T05:00:00Z The analogues of these objects in the Galaxy are called magnetars and radio pulsars, respectively, and spin with a period of the order of seconds or subseconds10. Unexpected emission pattern adds to the enigma of fast radio bursts 2020-06-16T04:00:00Z Astronomers believe there are something like 100 million neutron stars in the Galaxy, yet we have only found about 2000 pulsars in the Milky Way. Astronomy 2016-10-13T00:00:00Z Coherent emission also occurs in pulsars through a mechanism that is not fully understood. An Audacious Explanation for Fast Radio Bursts 2020-06-24T04:00:00Z Among NICER’s targets, the team plans to include at least a couple of high-mass pulsars, including the current record-holder for most massive neutron star—a behemoth with a mass 2.14 times that of the Sun. The Strange Hearts of Neutron Stars 2020-05-26T04:00:00Z As a group, NANOGrav is cautious, and has refrained from claiming they have seen a gravitational-wave signal, which requires observing highly specific correlations among their pulsar signals’ arrival times. Galaxy-Size Gravitational-Wave Detector Hints at Exotic Physics 2021-02-03T05:00:00Z A “day” on a pulsar lasts only a few milliseconds, so the stars would rise and set hundreds of times per second, moving too fast for your eye to perceive their motion. How’s the View From a Spinning Star? 2020-04-07T04:00:00Z The pulsar is the bright spot at the center of the concentric rings. Astronomy 2016-10-13T00:00:00Z The 27 year-old astrophysicist, who studies pulsars and gravitational waves, said he was trying to liven up the boredom of self-isolation with the four powerful neodymium magnets. Astrophysicist gets magnets stuck up nose while inventing coronavirus device 2020-03-30T04:00:00Z The X-rays originate from million-degree hotspots on a pulsar’s surface, where a powerful magnetic field rips charged particles off the exterior and slams them back down at the opposing magnetic pole. The golden age of neutron-star physics has arrived 2020-03-03T05:00:00Z NANOGrav has another two and a half years of pulsar data they are combing through, which could help distinguish whether some or a combination of all these explanations might be viable. Galaxy-Size Gravitational-Wave Detector Hints at Exotic Physics 2021-02-03T05:00:00Z Professor Dame Jocelyn Bell Burnell is credited with one of the most important discoveries of the last century: the discovery of radio pulsars. Seven female scientists you may not have heard of 2020-02-06T05:00:00Z Astronomers soon began to look for a connection between the pulsar and the large energy output of the surrounding nebula. Astronomy 2016-10-13T00:00:00Z The death dance of a white dwarf star and a pulsar reveal relativistic frame dragging — also known as the Lense-Thirring effect — in which a fast-spinning object distorts the fabric of space-time around it. Daily briefing: Genetically engineered gut microbes can protect honey bees 2020-01-30T05:00:00Z At the same time, the team is beginning to analyse data from a second target, a slightly heavier pulsar with a white-dwarf companion. The golden age of neutron-star physics has arrived 2020-03-03T05:00:00Z A potential signal seen in the light from dead stellar cores known as pulsars has driven a flurry of theoretical papers speculating about exotic explanations. Galaxy-Size Gravitational-Wave Detector Hints at Exotic Physics 2021-02-03T05:00:00Z In other words, the drift was partially because of the pulsar tumbling as it was dragged along in the swirl of spacetime surrounding its white dwarf companion. Bizarre Cosmic Dance Offers Fresh Test for General Relativity 2020-01-30T05:00:00Z The radiation itself is also confined to a narrow beam, which explains why the pulsar acts like a lighthouse. Astronomy 2016-10-13T00:00:00Z The pulsar itself spins around more than two times per second. Daily briefing: Genetically engineered gut microbes can protect honey bees 2020-01-30T05:00:00Z Among NICER’s targets, the team plans to include at least a couple of high-mass pulsars, including the current record-holder for most massive neutron star — a behemoth with a mass 2.14 times that of the Sun. The golden age of neutron-star physics has arrived 2020-03-03T05:00:00Z “The drop-off of positrons is interesting, whether it is caused by dark matter, pulsars or something else,” says M.I.T. particle physicist Tracy Slatyer. Space Station Dark Matter Experiment Gets Vital Repairs 2019-12-11T05:00:00Z “At Green Bank, you have people working with radio telescopes and high-tech machinery, involved in things like pulsar research, while surrounded by a vast expanse of woods and wildlife,” Eichenbaum said. Observatory inspires musical composition by professor 2019-12-08T05:00:00Z First, we can measure the masses of some pulsars, and they do turn out be in the range of 1.4 to 1.8 times that of the Sun—just what theorists predict for neutron stars. Astronomy 2016-10-13T00:00:00Z The pulsar’s metronome-like radio emissions showed researchers how this extreme relativistic system pulls space-time around it, causing the pulsar’s orbit to wobble exactly as predicted by general relativity. Daily briefing: Genetically engineered gut microbes can protect honey bees 2020-01-30T05:00:00Z After they first form, pulsars are thought to slow their rotation over millions of years. The golden age of neutron-star physics has arrived 2020-03-03T05:00:00Z The low-frequency antennas observe radio emissions from pulsars—spinning neutron stars—and the epoch of reionization, when light from the universe’s first stars was ionizing the hydrogen in the space between galaxies. Giant radio telescope array prepares to begin construction in Australia and South Africa 2019-11-25T05:00:00Z A pulsar packs the mass of the entire sun into a ball only 20 kilometers across, making it so dense that with one false move it would collapse and become a black hole. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z Having measured how much the pulsar is slowing down, we can calculate how much rotation energy the neutron star is losing. Astronomy 2016-10-13T00:00:00Z The white dwarf is the size of Earth and the pulsar is the size of a city — but both contain more mass than the Sun. Daily briefing: Genetically engineered gut microbes can protect honey bees 2020-01-30T05:00:00Z Before this finding, the only confirmed exoplanet known orbited a pulsar—a dense remnant from a supernova explosion. Cosmology and Exoplanets Win 2019 Nobel Prize in Physics 2019-10-08T04:00:00Z During the testing phase, the telescope discovered more than 100 pulsars. Gigantic Chinese telescope opens to astronomers worldwide 2019-09-23T04:00:00Z Only one other pulsar is known to have a planet, and even in that case, the evidence is not as secure. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z Pulsars thousands of years old have lost too much energy to emit appreciably in the visible and X-ray wavelengths, and they are observed only as radio pulsars; their periods are a second or longer. Astronomy 2016-10-13T00:00:00Z The models point to a process called inverse Compton scattering, in which the pulsar’s magnetic field whips up electrons to energies far higher than achieved in particle accelerators on Earth. Highest energy light ever seen traced to Crab Nebula 2019-07-08T04:00:00Z There are, no doubt, people all over the world wearing a version of this pulsar spread out on a T-shirt who have no idea what it’s relating to. Why Joy Division? Henry Rollins examines Jon Savage’s oral history of the post-punk band 2019-04-18T04:00:00Z The International Pulsar Timing Array is using radio telescopes around the world to monitor the regular emissions from pulsars, looking for distortions that would reveal the passing of these low-frequency gravitational waves. Gigantic Chinese telescope opens to astronomers worldwide 2019-09-23T04:00:00Z The stunning thing was that the star is not an ordinary star like the sun; it’s a pulsar. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z There is one other reason we can see only a fraction of the pulsars in the Galaxy. Astronomy 2016-10-13T00:00:00Z Extremely high-energy protons passing through the intense magnetic field of a spinning neutron star—also known as a pulsar—should produce more Cherenkov radiation than synchrotron radiation, the researchers predict. Physicists predict a way squeeze light from the vacuum of empty space 2019-03-29T04:00:00Z The discoverer of pulsars donated the £2.3m she won as part of an international science award. Fund boosts female and black physicists 2019-03-19T04:00:00Z The pulse was still bright, implying the source's energy was a billion times that of a pulsar pulse. A homespun Canadian telescope could explain mysterious radio signals from the distant universe 2019-03-14T04:00:00Z The only hang-up was whether the objects orbiting the pulsar should qualify as planets. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z Thus, we estimate that we are unable to observe a large number of neutron stars because their pulsar beams miss us entirely. Astronomy 2016-10-13T00:00:00Z Start with cosmologist Jocelyn Bell Burnell, who describes her pulsar discovery, her career and “the grit that was needed just to be there”. Daily briefing: Cuba acknowledges climate change threats in its constitution 2019-03-10T05:00:00Z Prof Bell Burnell was awarded a Breakthrough Prize last September for her discovery in 1967 of radio pulsars - rapidly rotating star remnants. Fund boosts female and black physicists 2019-03-19T04:00:00Z Many theorists initially put forward models based on the violent collapse or merger of compact objects, including white dwarfs, neutron stars, pulsars, and black holes. A homespun Canadian telescope could explain mysterious radio signals from the distant universe 2019-03-14T04:00:00Z The pulsar discovery forced a more careful appraisal. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z At the same time, it turns out that only a few of the pulsars discovered so far are embedded in the visible clouds of gas that mark the remnant of a supernova. Astronomy 2016-10-13T00:00:00Z We have known since the 1990s that planets exist around pulsars, which are extraordinarily dense objects born out of the violent explosions of stars. Living Near a Supermassive Black Hole 2019-03-11T04:00:00Z Just days before the government closed, she and her colleagues at the Fermi space telescope observed a pulsar flashing in an unprecedented way. Disruptive, disappointing, chaotic: Shutdown upends scientific research 2018-12-28T05:00:00Z Last week, 50 years after her work as a graduate student, she earned the $3 million Special Breakthrough Prize in Fundamental Physics for her discovery of pulsars which revolutionized our understanding of the universe. Jocelyn Bell Burnell and the Discovery of Pulsars 2018-12-29T05:00:00Z But the pulsar planets were treated as freaks, and the search for more of them has turned out to be barren and unproductive. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z This might at first seem mysterious, since we know that supernovae give rise to neutron stars and we should expect each pulsar to have begun its life in a supernova explosion. Astronomy 2016-10-13T00:00:00Z It is therefore reasonable to assume that planets might also exist around black holes, which, perhaps surprisingly to many people, have a much weaker impact on their environment than pulsars. Living Near a Supermassive Black Hole 2019-03-11T04:00:00Z As a graduate student in 1967, she co-discovered pulsars, a breakthrough widely considered one of the most important scientific advances of the 20th century. Watch Live Today: A Breakthrough Pulsar Discovery 2018-10-25T04:00:00Z “A lot of the pulsar story happened because I was a minority person and a PhD student,” she said. Baby-saving drug wins $3m prize in 'Oscars for science' 2018-10-17T04:00:00Z Known for: Discovery of pulsars - a type of neutron star that emits a beam of radiation. Four women who changed the face of physics 2018-10-03T04:00:00Z But the lifetime of a pulsar turns out to be about 100 times longer than the length of time required for the expanding gas of a supernova remnant to disperse into interstellar space. Astronomy 2016-10-13T00:00:00Z Dame Jocelyn Bell Burnell, the British astrophysicist who was passed over for the 1974 physics Nobel after she discovered pulsars, maintains that not winning has meant a whole load more parties. The Nobel prize in physiology or medicine 2018 – live 2018-10-01T04:00:00Z When the discovery of pulsars was recognized with the 1974 Nobel Prize in Physics, the award went to her graduate advisor. Watch Live Today: A Breakthrough Pulsar Discovery 2018-10-25T04:00:00Z The realization that pulsars exist “was an incredible discovery,” said Alice Harding, an astrophysicist at NASA's Goddard Space Flight Center. She made the discovery, but a man got the Nobel. A half-century later, she’s won a $3 million prize. 2018-09-08T04:00:00Z Hewish received the 1974 Nobel Prize in Physics for his "decisive role in the discovery of pulsars", but she was not included in the citation. Four women who changed the face of physics 2018-10-03T04:00:00Z Thus, most pulsars are found with no other trace left of the explosion that produced them. Astronomy 2016-10-13T00:00:00Z In time, and after much painstaking observation on her part, this was revealed to be a new type of star: a pulsar. Hooray for Jocelyn Bell Burnell – the world needs more scientists like her | Susan Watts 2018-09-07T04:00:00Z Fifty years after Jocelyn Bell Burnell discovered pulsars — compact rotating stars that emit beams of radiation — the astrophysicist has been awarded one of the most lucrative prizes in science: a US$3-million Breakthrough Prize. Thursday briefing: Just Google it 2018-09-05T04:00:00Z The detection of pulsars suggested that another hypothetical phenomenon — a black hole — might also be real. She made the discovery, but a man got the Nobel. A half-century later, she’s won a $3 million prize. 2018-09-08T04:00:00Z Bell Burnell won the Breakthrough Prize in Fundamental Physics on Thursday for her role in discovering radio pulsars. UK physicist donates $3 million prize to boost diversity 2018-09-06T04:00:00Z In addition, some pulsars are ejected by a supernova explosion that is not the same in all directions. Astronomy 2016-10-13T00:00:00Z I hope she enjoys the ceremony in California this autumn to mark this latest award for her landmark discovery of pulsars and her lifetime of inspiring leadership in the scientific community. Hooray for Jocelyn Bell Burnell – the world needs more scientists like her | Susan Watts 2018-09-07T04:00:00Z Bell Burnell won the Breakthrough Prize in Fundamental Physics on Thursday for her role in discovering radio pulsars. UK physicist donates $3 million prize to boost diversity 2018-09-06T04:00:00Z Just over a half century ago, while a British graduate student at the University of Cambridge, Bell Burnell made a discovery that transformed astronomy: pulsars. Pulsar Discoverer Jocelyn Bell Burnell Wins $3-Million Breakthrough Prize 2018-09-06T04:00:00Z She was able to characterize these as signs of radio pulses emanating from a spinning star: the pulsar. Pulsar discoverer Jocelyn Bell Burnell wins $3-million Breakthrough Prize 2018-09-05T04:00:00Z For instance, in contrast to the case of SN 1054, which yielded the spinning pulsar in the Crab Nebula, none of these historical supernovae shows any evidence of stellar remnants that have survived their explosions. Astronomy 2016-10-13T00:00:00Z “That would be a more direct link to the pulsar population in our own galaxy.” Record-Breaking Signal May Help Solve the Mystery of Fast Radio Bursts 2018-08-13T04:00:00Z A spinning neutron star that emits a beam of electromagnetic radiation is known as a pulsar. General relativity verified by a triple-star system 2018-07-03T04:00:00Z One white dwarf and the pulsar are orbiting each other every 1.6 days. Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z Meanwhile, Mingarelli and other astronomers are currently monitoring bursts from an array of pulsars scattered around the galaxy, looking for slight shifts in their arrival times at Earth2. Pulsar discoverer Jocelyn Bell Burnell wins $3-million Breakthrough Prize 2018-09-05T04:00:00Z Check to make sure that this pulsar model does not violate relativity. Astronomy 2016-10-13T00:00:00Z Other possible explanations include cataclysmic events such as colliding neutron stars, pulsars collapsing to form black holes or particularly violent flares from “magnetars”—pulsars with extreme magnetic fields. Record-Breaking Signal May Help Solve the Mystery of Fast Radio Bursts 2018-08-13T04:00:00Z The authors show that their results improve on certain pre-existing constraints on the parameters that govern these theories — some arising from Solar System measurements and some from data on binary systems containing a pulsar. General relativity verified by a triple-star system 2018-07-03T04:00:00Z Of course, the pulsar and white dwarf are very massive objects themselves, with strong self gravity. Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z MeerKAT will also watch for pulsars, dense and rapidly spinning stellar remnants. New radio telescope in South Africa will study galaxy formation 2018-06-19T04:00:00Z Calculate the rotation speed of the Crab Nebula pulsar at its equator, given its period of 0.033 s. Astronomy 2016-10-13T00:00:00Z According to McLaughlin, the most favored explanation for any given FRB is a pulsar, a dense stellar core that spins like a lighthouse beacon, only far faster. Record-Breaking Signal May Help Solve the Mystery of Fast Radio Bursts 2018-08-13T04:00:00Z The pulses are so regular that variations in their observed period can be readily interpreted as being due to the gravitational tug of another astronomical body on the pulsar. General relativity verified by a triple-star system 2018-07-03T04:00:00Z General relativity predicts that the accelerations of the white dwarf and pulsar, due to being in free fall towards the outer white dwarf, should be identical—despite differences in mass and self-gravity. Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z Using radio telescopes, they monitor pulsars inside the Milky Way and look for small variations in their signals caused by the passage of gravitational waves through the galaxy. Here Come the Waves 2018-05-22T04:00:00Z If the pulsar shown in Figure 23.16 is rotating 100 times per second, how many pulses would be detected in one minute? Astronomy 2016-10-13T00:00:00Z Others were found by searching for variations in the predictable rhythms of pulsars. NASA steps up its planet-hunting game with the launch of TESS 2018-04-20T04:00:00Z That was the year the discovery of the first such worlds, orbiting a pulsar called PSR 1257+12, about 2,300 light-years from Earth, was announced. The search for exoplanets moves to Earth’s back yard 2018-04-19T04:00:00Z They measured a parameter called Delta, which describes the fractional difference between the acceleration of the white dwarf and the more massive pulsar. Triple-Star Test Shows Einstein Was Right, Again 2018-07-05T04:00:00Z Using radio telescopes, they monitor pulsars inside the Milky Way and look for small variations in their signals, caused by the passage of gravitational waves through the galaxy. How gravitational waves could solve some of the Universe’s deepest mysteries 2018-04-10T04:00:00Z The two beams are located along the pulsar’s equator, which is aligned with Earth. Astronomy 2016-10-13T00:00:00Z We've gotten very good at detecting rapid variations in bright sources like pulsars and even active galactic nuclei. The Techno-Signature Challenge 2018-03-11T05:00:00Z It is the first demonstration in space of the long-sought technology known as pulsar navigation. NASA Test Proves Pulsars Can Function as a Celestial GPS 2018-01-17T05:00:00Z The line between black hole and millisecond pulsar only becomes hazy for smaller, lighter objects below that approximate threshold. Black Hole Pretenders May Be Superfast-Spinning Pulsars 2017-11-22T05:00:00Z They found each pulsar is surrounded by a kind of murky “fog,” from which relatively few positrons can escape to strike Earth. Through a Gas, Darkly: Scientists Trace the Origins of Earth's Antimatter 2017-11-16T05:00:00Z Pulled by the powerful gravity of its companion, the pulsar is moving at about one-tenth the speed of light in its orbit. Astronomy 2016-10-13T00:00:00Z “Jupiter acts as an analogy for exoplanets, for brown dwarfs, for pulsars — a whole variety of astrophysical objects that we can’t get to,” he says. Rare glimpse of two of Jupiter’s auroras reveal they're dancing to different beats 2017-10-30T04:00:00Z In 1999–2000, the US Naval Research Laboratory flew a satellite experiment that showed that, in theory, spacecraft could orient themselves using pulsars. NASA Test Proves Pulsars Can Function as a Celestial GPS 2018-01-17T05:00:00Z Ten years later, his work on pulsars was recognized with a Nobel Prize. Recent editorials published in Iowa newspapers 2017-10-30T04:00:00Z One promising explanation: the excess could come from nearby pulsars, rapidly whirling remnants of expired massive stars that violently expel positrons and a menagerie of other high-energy particles as they spin. Through a Gas, Darkly: Scientists Trace the Origins of Earth's Antimatter 2017-11-16T05:00:00Z According to general relativity, this system of stellar corpses should be radiating energy in the form of gravitational waves at a high enough rate to cause the pulsar and its companion to spiral closer together. Astronomy 2016-10-13T00:00:00Z Magnetic fields show up on pulsars, exoplanets, and brown dwarfs, but Jupiter is close to home. Rare glimpse of two of Jupiter’s auroras reveal they're dancing to different beats 2017-10-30T04:00:00Z Without pulsar navigation, spacecraft must communicate with Earth regularly to confirm their position. NASA Test Proves Pulsars Can Function as a Celestial GPS 2018-01-17T05:00:00Z In addition to using pulsar timing, many researchers hope to also study gravitational waves through space-based laser interferometers. The Future of Gravitational Wave Astronomy 2017-10-03T04:00:00Z Pulsars are among the most precise clocks in the cosmos: These pirouetting objects emit powerful beams of electromagnetic radiation that shine on Earth with a regular cadence, as if the pulsars were lighthouses. Gravitational Waves Won the Physics Nobel Prize—Here's Why 2017-10-03T04:00:00Z By today, more than 2500 such sources have been discovered; they are now called pulsars, short for “pulsating radio sources.” Astronomy 2016-10-13T00:00:00Z Opened in 1963, Arecibo is a multipurpose facility that can function as a passive radio telescope for astronomy: It was used in the Nobel Prize–winning discovery of the first binary pulsar in 1974. Hurricane damage threatens Arecibo Observatory’s future 2017-09-26T04:00:00Z Its main job is to measure the size of pulsars to better understand the ultra-dense matter that makes them up. NASA Test Proves Pulsars Can Function as a Celestial GPS 2018-01-17T05:00:00Z “Look at Earth with respect to these 14 pulsars”, the record said. Voyager 1 and the Beauty and Power of Science 2017-09-14T04:00:00Z Astronomers can use changes in pulsars’ time-keeping to point to gravitational radiation, which sweeps through an array of these dead stars in a telltale way. Gravitational Waves Won the Physics Nobel Prize—Here's Why 2017-10-03T04:00:00Z Astronomers have found pulsars in binary systems that are spinning at a rate of more than 500 times per second! Astronomy 2016-10-13T00:00:00Z Eventually, this flavor of neutron star became known as a pulsar. Strange Stars Caught Wrinkling Spacetime? Get the Facts. 2017-08-25T04:00:00Z Gendreau notes that the famous ‘golden record’ aboard NASA’s Voyager spacecraft carries a map that pinpoints the location of the Solar System relative to 14 pulsars. NASA Test Proves Pulsars Can Function as a Celestial GPS 2018-01-17T05:00:00Z During our conversation, we talked about how the pulsar map might fit into the current debate about deliberately sending messages to extraterrestrial civilizations. No, a Map NASA Sent to Space Is Not Dangerous to Earth 2017-08-17T04:00:00Z Unlike LIGO, pulsar timing arrays can detect the gravitational waves released by colliding supermassive black holes, or the bruisers churning away at the centers of galaxies. Gravitational Waves Won the Physics Nobel Prize—Here's Why 2017-10-03T04:00:00Z Indeed, some of the fast pulsars are observed to be part of binary systems, while others may be alone only because they have “fully consumed” their former partner stars through the mass transfer process. Astronomy 2016-10-13T00:00:00Z But pulsars do slow down, sometimes by a mere but measurable billionths of a second a year. How a NASA Spacecraft May Help Aliens Find Earth 2017-08-14T04:00:00Z When radio pulsars were first detected in 1967, “little green men” were at least considered a possibility – before it was that they are rapidly rotating neutron stars. How do you work out if a signal from space is a message from aliens? 2017-07-27T04:00:00Z One arrived 50 years ago, with the discovery of pulsars. Pulsars still dazzle after 50 years 2017-07-03T04:00:00Z Many objects in space, like pulsars, send out radio signals with a certain periodicity: flashes of electromagnetic activity that switch on and off at regular rates. Greetings, E.T. (Please Don’t Murder Us.) 2017-06-28T04:00:00Z Another binary neutron star system includes two pulsars that are orbiting each other every 2 hours and 25 minutes. Astronomy 2016-10-13T00:00:00Z The length of the lines connecting each pulsar to a central point—the sun—indicates how far they are from home. How a NASA Spacecraft May Help Aliens Find Earth 2017-08-14T04:00:00Z My favorite moment was during one soft passage in which the recorded sound of a pulsar was played. Galactic Pulses: The Best Moments of Make Music New York 2017-06-23T04:00:00Z But astronomers immediately saw beyond pulsars’ status as objects of curiosity to their potential as cosmic probes. Pulsars still dazzle after 50 years 2017-07-03T04:00:00Z Just as the Global Positioning System uses the ticks of satellites’ atomic clocks to triangulate a receiver’s position, pulsar navigation would use the arrival times of light from these regularly flashing stars. Neutron stars set to open their heavy hearts 2017-05-30T04:00:00Z When pulsars were discovered, the astronomers involved with the discovery talked about finding “little green men.” Astronomy 2016-10-13T00:00:00Z The Voyager version of route-finding pins the sun onto our galaxy using 14 pulsars, which are the rapidly spinning corpses of exploded stars. How a NASA Spacecraft May Help Aliens Find Earth 2017-08-14T04:00:00Z They found a halo around the pulsar, extending a few light-years across, that was emitting very high-energy gamma rays. Case weakens for antimatter sign of dark matter 2017-03-06T05:00:00Z He found in archived pulsar data a 5-millisecond radio frequency burst that was so bright it couldn’t be ignored. Astronomers grapple with new era of fast radio bursts 2017-02-27T05:00:00Z He calls it “pulsar riding,” named after the astronomical phenomenon of a spinning neutron star that emits electromagnetic radiation. He’s only 7 years old, but this Maryland boy ‘could be the next Einstein’ 2017-02-02T05:00:00Z The existence of such waves was first confirmed in observations of a pulsar in orbit around another neutron star whose orbits were spiraling closer and losing energy in the form of gravitational waves. Astronomy 2016-10-13T00:00:00Z To my dad, the answer was obvious: pulsars. How a NASA Spacecraft May Help Aliens Find Earth 2017-08-14T04:00:00Z But Hooper and his colleagues also calculated how many lower energy positrons the pulsar would be expected to generate, based on models. Case weakens for antimatter sign of dark matter 2017-03-06T05:00:00Z Others, however, think more mundane sources such as pulsars are probably the cause. Galactic X-rays could point way to dark matter - BBC News 2017-02-02T05:00:00Z But researchers now report the discovery of a pulsar that is a white dwarf — the spent remnant of a star like the Sun. Astrophysics: Odd dwarf star is a pulsar : Nature : Nature Research 2017-01-24T05:00:00Z In an earlier announcement Tuesday, the agency announced plans to launch a $188 million astronomy mission in 2020 to probe neutron stars, pulsars and black holes. NASA Plans Two $500 Million Missions to Explore Asteroids 2017-01-04T05:00:00Z For starters, pulsars are incredibly long-lived, staying active for tens of millions to multiple billions of years. How a NASA Spacecraft May Help Aliens Find Earth 2017-08-14T04:00:00Z He says the study is somewhat speculative in its modelling of the pulsars, such as how readily the lower energy positrons of interest diffuse through the halo. Case weakens for antimatter sign of dark matter 2017-03-06T05:00:00Z The radio emissions themselves, Dr. Chatterjee said, resemble the blasts from pulsars — the spinning neutron stars that emit clocklike pulses of radiation and whose discovery in 1968 did indeed elicit speculation about little green men. Astronomers Trace Brief Signals to a Faraway Galaxy 2017-01-04T05:00:00Z Astronomers were searching for new examples of magnetised neutron stars called pulsars, but found a new phenomenon - a radio burst from 2001. Mystery cosmic radio bursts pinpointed - BBC News 2017-01-04T05:00:00Z That motion would, in turn, shorten or stretch the time between pulses from pulsars in different directions, in an effect akin to the Doppler shift. Ripples in spacetime: Science's 2016 Breakthrough of the Year 2016-12-22T05:00:00Z Spinning stars called pulsars and the cosmic clouds of hydrogen that hold clues to the origin of the Universe emit faint signals, whereas mysterious ‘fast radio bursts’ are transient. Daring Chinese telescope is poised to transform astronomy 2016-09-25T04:00:00Z It will take 200 days of such drift scan observations to survey the full northern sky, and he expects they will discover as many as 1000 pulsars, adding to the roughly 2500 now known. World’s largest radio telescope will search for dark matter, listen for aliens 2016-09-26T04:00:00Z Astronomers also hope to use the telescope to locate thousands more pulsars, the highly magnetized neutron stars that rotate, creating a metronome-like pulse that is a boon to measurements. China Hunts for Scientific Glory, and Aliens, With New Telescope 2016-09-25T04:00:00Z After construction was complete, Prof Peng said the instrument was able to detect radio waves from three pulsars, which are rapidly rotating, extremely dense stars. China's colossal radio telescope begins testing - BBC News 2016-09-25T04:00:00Z To spot those waves, astronomers are turning to stellar timepieces called millisecond pulsars. Ripples in spacetime: Science's 2016 Breakthrough of the Year 2016-12-22T05:00:00Z This is because a gravitational wave passing through space will momentarily change distances between pulsars resulting in ever so slight changes in the arrival time of their pulses. China Builds World's Largest Radio Telescope 2016-07-11T04:00:00Z “We will conduct the world’s best survey for pulsars,” Li says. World’s largest radio telescope will search for dark matter, listen for aliens 2016-09-26T04:00:00Z The telescope will, of course, be put to more serious uses: searching for extraterrestrial life and exotica of the Universe such as pulsars, quasars, and gravitational waves. China has built a radio telescope the size of 30 soccer fields to look for aliens 2016-07-04T04:00:00Z “Understanding the fundamental physics of pulsars will help us understand the Big Bang,” Yue Youling, associate researcher of National Astronomical Observatories, told CCTV. China Fits Final Piece to World’s Biggest Radio Telescope 2016-07-04T04:00:00Z The Crab pulsar occasionally releases extremely bright and narrow radio flares, Spitler says. Why ultra-powerful radio bursts are the most perplexing mystery in astronomy 2016-06-27T04:00:00Z The fields occasionally produce explosive outbursts, such as the sun's solar flares and colossal flares from highly magnetic pulsars known as magnetars, which are far more powerful than supernovae. New satellites get to the bottom of space weather 2016-05-12T04:00:00Z The world’s largest radio telescope will catalog pulsars; probe gravitational waves, dark matter, and fast radio bursts; and listen for transmissions from alien civilizations. World’s largest radio telescope will search for dark matter, listen for aliens 2016-09-26T04:00:00Z As the years went by, the scientists found that this 'binary pulsar' was losing energy and spiralling inwards exactly as predicted by Einstein's theory. The black-hole collision that reshaped physics 2016-03-22T04:00:00Z After debugging, it will be used to detect for pulsars over 1,000 light years deep into the universe. China Fits Final Piece to World’s Biggest Radio Telescope 2016-07-04T04:00:00Z But Lorimer, an astrophysicist at West Virginia University in Morgantown, saw this object erupt only once, and with more power than any known pulsar. Why ultra-powerful radio bursts are the most perplexing mystery in astronomy 2016-06-27T04:00:00Z The three-day festival, which begins on 22 July, will see science events, such as pulsar hunting and robot workshops. Jean Michel Jarre to headline Jodrell Bank festival Bluedot - BBC News 2016-03-14T04:00:00Z But Spitler favours a different strongly magnetic species: a type of pulsar that spins more rapidly than magnetars but is capable of intermittent giant pulses of radiation. Fresh confusion over origins of enigmatic radio-wave blasts 2016-03-01T05:00:00Z The signal also provided researchers with the first empirical test of general relativity beyond regions — including the space around the binary pulsar — where there is comparatively little space-time warping. The black-hole collision that reshaped physics 2016-03-22T04:00:00Z An artist rendering of a planet orbiting a pulsar. How scientists will keep searching for gravitational waves 2016-02-13T05:00:00Z Australia in particular is a leading nation in this search, using distant pulsars as the ruler at the Parkes telescope. Gravitational Waves Discovered: Top Scientists Respond 2016-02-11T05:00:00Z One of those, called NANOGrav, uses millisecond pulsars— which keep exceptionally accurate time—as natural gravitational wave detectors. Found! Gravitational Waves, or a Wrinkle in Spacetime 2016-02-11T05:00:00Z The only planet known to reside in a globular cluster orbits an ancient pulsar, an environment that is unfriendly for life1. Alien life could thrive in ancient star clusters 2016-01-05T05:00:00Z And it’s not even orbiting a proper star, but a pulsar. Dense Star Fields Might Be Home To Extraterrestrial Life 2016-01-07T05:00:00Z Like distant cosmic lighthouses, pulsars are rotating neutron stars that emit a long beam of electromagnetic radiation. How scientists will keep searching for gravitational waves 2016-02-13T05:00:00Z This controversy lasted into the early 1980s and coincided with the discovery of the binary pulsar which was a real-life system whose orbit was decaying in line with the predictions of Einstein's formula. Gravitational Waves Discovered: Top Scientists Respond 2016-02-11T05:00:00Z “What’s nice about pulsars is that there are just a lot of them to play with,” Cordes says—more than a hundred quadrillion in the observable universe. Fast Radio Bursts Mystify Experts — for Now 2015-12-02T05:00:00Z It deftly explains the behavior of orbiting binary pulsars and the orbit of Mercury. Einstein's Unfinished Dream: Marrying Relativity to the Quantum World 2015-11-24T05:00:00Z The pair showed that a neutron star, now known as the Hulse-Taylor pulsar, was part of a binary system whose orbit was decaying at a rate consistent with it pumping out gravitational waves. Will this European satellite confirm Einstein’s last unproven idea? 2015-11-21T05:00:00Z However, observing pulsars hasn't turned up any evidence of waves just yet. How scientists will keep searching for gravitational waves 2016-02-13T05:00:00Z “It’s always been my fear with this excess that we’d never find a confirming signal in any other dark matter channel but also no good astrophysical observations” such as pulsars, Slatyer says. Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z Such environments tend to harbor several varieties of young, highly active pulsars rather than old neutron stars and white dwarfs, leaving the former as the most probable progenitor for this particular FRB. Fast Radio Bursts Mystify Experts — for Now 2015-12-02T05:00:00Z This image of a pulsar, which was the on cover of Unknown Pleasures, has become ubiquitous with notions of indie and goth. What's your favourite band T-shirt of all time? 2015-11-04T05:00:00Z “I want just to figure out what’s going on,” he says, adding that he now leans slightly more towards the pulsar explanation. Zombie physics: 6 baffling results that just won't die 2015-10-29T04:00:00Z Another technique is to observe mysterious stars known as pulsars over the course of many years, to see if they are altered by gravitational waves. How scientists will keep searching for gravitational waves 2016-02-13T05:00:00Z As for pulsars, “myself, I would say they are equally plausible.” Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z As monumental as this discovery was, the 51 Peg b announcement perhaps resonated even more, since pulsars are a far cry from "normal" stars like Earth's sun. 20 Years on, the Future Is Bright for Exoplanet Science 2015-10-20T04:00:00Z They might be an anomalous pulsar or a quasar that shows odd variability. Computers Would Never Have Found 'Alien Superstructure' Star--It Required Citizen Science 2015-10-21T04:00:00Z Famously, the discovery of rotating stellar corpses, eventually called as pulsars, were first suggested to be aliens. ‘Alien megastructure’ could explain mysterious new Kepler results 2015-10-16T04:00:00Z Another way to scale up gravitational wave detection is to observe strange dead stars, known as pulsars, for many years. How scientists will keep searching for gravitational waves 2016-02-13T05:00:00Z Clumps would be expected if the light originated from individual objects—like pulsars—rather than from dark matter particles spread evenly through space. Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z Now, it’s widely accepted that a pulsar is a specific type of neutron star—one of three outcomes of a star death. Pop Culture Pulsar: The Science Behind Joy Division's Unknown Pleasures Album Cover 2015-10-13T04:00:00Z Instead of a black hole taking energy in, he’s a pulsar pumping it out in the form of pain relieved, occasionally, by an openness to Jane’s beauty. ‘Steve Jobs’ Review: Good Apple, Slightly Mushy Core 2015-10-08T04:00:00Z A pulsar is a very dense neutron star that amounts to the stellar leftovers following the supernova explosion of an even more massive star. This Pulsar Is Blasting Part Of Its Neighbor Out Into Space 2015-07-27T04:00:00Z And it's even possible that pulsars will reveal gravitational waves left over from the Big Bang. How scientists will keep searching for gravitational waves 2016-02-13T05:00:00Z “Right now, I think millisecond pulsars are the best bet,” Weniger says. Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z Although there’s definitely variation from pulse to pulse, the average shape over about a minute results in a characteristic form that is different for each individual pulsar. Pop Culture Pulsar: The Science Behind Joy Division's Unknown Pleasures Album Cover 2015-10-13T04:00:00Z Radio telescopes are designed to receive radio waves from sources in outer space such as pulsars, or possibly, alien civilisations. Australia's role in the search for life in space - BBC News 2015-07-24T04:00:00Z This pulsar is 7,500 light years from Earth, so there’s little need to worry that it’s lobbing space stuff bombs our way. This Pulsar Is Blasting Part Of Its Neighbor Out Into Space 2015-07-27T04:00:00Z By comparison, natural sources of cosmic noise – quasars, pulsars or the gas in the Milky Way – typically emit broad-band signals. Can Yuri Milner Find Intelligent Extraterrestrial Beings? 2015-07-20T04:00:00Z And one issue with the pulsar explanation is the question of why so many would be clustered in a sphere around the hub of the Milky Way. Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z The first pulsar was identified in 1967, and the definition evolved over the next year or so as scientists tried to resolve earlier predictions against rapidly accumulating observations. Pop Culture Pulsar: The Science Behind Joy Division's Unknown Pleasures Album Cover 2015-10-13T04:00:00Z And the sky survey might discover more pulsars, and help to home in on the origin of mysterious “fast radio bursts” — pulses lasting only a few milliseconds. Search for extraterrestrial intelligence gets a $100-million boost 2015-07-19T04:00:00Z But the transmissions were later traced to a spinning neutron star, and marked the discovery of pulsating radio stars, or pulsars. Anybody out there? Massive radio wave project to scan far regions for alien life 2015-07-20T04:00:00Z However, that world does not orbit a normal star, but instead circles a pulsar—a dense, rapidly spinning remnant of a supernova explosion. Astronomers Weigh Mars-Sized Exoplanet 2015-06-17T04:00:00Z “It really looks like a different population that was formed in a different way” than familiar pulsars, Slatyer says. Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z These strongly magnetized and rapidly rotating neutron stars are called pulsars. Pop Culture Pulsar: The Science Behind Joy Division's Unknown Pleasures Album Cover 2015-10-13T04:00:00Z One should note here Bartusiak’s use of the word “appears,” for although there is now a vast amount of indirect evidence for black holes — including quasars and pulsars — we still lack direct evidence. The centuries-old battle over the question of black holes 2015-05-08T04:00:00Z One way to do this would involve pulsars: compact, rapidly spinning stars that beam radio waves across the sky like lighthouse beacons. 3D simulations of colliding black holes hailed as most realistic yet 2015-04-19T04:00:00Z Nor, they say, are such bursts likely to be galactic chirping from an exotic pulsar. Bad Week For Alien Hunters 2015-04-13T04:00:00Z The same goes for the search for pulsars in the galactic center. Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z Craft focused on pulse shapes, in an effort to shed light on emission mechanisms; and dispersion, to learn more about how those emissions might shift between the pulsar and Earth. Pop Culture Pulsar: The Science Behind Joy Division's Unknown Pleasures Album Cover 2015-10-13T04:00:00Z Then, in 2003 scientists discovered a pulsar system of two objects, one is the density of our sun, but about 12 miles across and the other is a larger white dwarf. The Next Einstein May Be A 27-Year-Old Iranian Woman 2015-03-10T04:00:00Z A pulsar is a small but improbably dense neutron star - the collapsed remnant of a supernova. 'Bent time' tips pulsar out of view 2015-01-09T05:00:00Z But he also concedes that the same excess might be explained equally well by phenomena related to pulsars or a cosmic ray outburst. New Doubt About Dark Matter 2014-12-20T05:00:00Z There, scientists expected to see plenty of the dense, rotating stars called pulsars, which are fairly common throughout the Milky Way. Dark Matter Black Holes Could Be Destroying Stars at the Milky Way’s Center 2014-11-10T05:00:00Z When folks refer to the data visualization, they generally just say that it shows a series of radio frequency periods from the first pulsar discovered. Pop Culture Pulsar: The Science Behind Joy Division's Unknown Pleasures Album Cover 2015-10-13T04:00:00Z “RRAT pulsars are excellent laboratories for general and special relativity theory as well as being interesting in an astrophysical sense as extreme stellar endpoints,” he said. Rowan student discovers star 2014-11-04T05:00:00Z All told, they clocked one billion rotations of the pulsar. 'Bent time' tips pulsar out of view 2015-01-09T05:00:00Z Kramer himself leads an effort to detect gravitational waves from radio observations of pulsars, a project that he says has in part driven the design of the telescope. World's Largest Radio Telescope Abandoned by Germany 2014-06-10T04:00:00Z But in superdense pulsars they might accumulate enough to do damage. Dark Matter Black Holes Could Be Destroying Stars at the Milky Way’s Center 2014-11-10T05:00:00Z Postscript I should note that pulsar research is still an active field. Pop Culture Pulsar: The Science Behind Joy Division's Unknown Pleasures Album Cover 2015-10-13T04:00:00Z Kramer himself leads an effort to detect gravitational waves from radio-observations of pulsars, a project that he says has in part driven the design of the telescope. Germany pulls back from international mega-telescope project : Nature News Blog 2014-06-08T04:00:00Z Prof Tim O'Brien is an astrophysicist working at the University of Manchester and the Jodrell Bank Observatory in the UK - one of the facilities that helped track the pulsar. 'Bent time' tips pulsar out of view 2015-01-09T05:00:00Z As Clark's team reports online this week in Astronomy & Astrophysics, this spin-up amplified the star's magnetic field so that when it exploded and collapsed, it became a magnetar rather than an ordinary pulsar. How to Turn a Star Into a Supermagnet 2014-05-14T04:00:00Z Khanna is also going to work on an astronomy data analysis project: doing signal searches for new pulsars in radio telescope data. Modeling Black Holes With Sony Playstations: The Next Challenge 2014-05-12T13:44:00Z What is a pulsar, how do you read the stacked plot, and how was the data collected? Pop Culture Pulsar: The Science Behind Joy Division's Unknown Pleasures Album Cover 2015-10-13T04:00:00Z The grounding of relativity in the real world through the discoveries of quasars, pulsars, neutron stars and black holes makes the paramount significance of experimental evidence in lending respectability to a theory quite clear. “The Perfect Theory”: The story of general relativity, and what makes something a science 2014-02-05T20:15:35Z The gravity between them is so extreme that it is thought to emit waves and to bend space - making the pulsar wobble. 'Bent time' tips pulsar out of view 2015-01-09T05:00:00Z “In my opinion, the GBT is the best pulsar telescope in the world,” Ransom says. US struggles to offload telescopes 2014-01-29T18:50:39.191Z “That should be fun … especially if we find a new pulsar!” he said. Modeling Black Holes With Sony Playstations: The Next Challenge 2014-05-12T13:44:00Z A pulsar is a spinning neutron star, the superdense leftover core of a supernova. [News & Analysis] Rare Celestial Trio to Put Einstein's Theory to the Test 2014-01-09T18:55:10.161Z Using the Green Bank Telescope, the astronomers discovered a pulsar 4,200 light-years from Earth, spinning nearly 366 times per second. Triple star system clue to gravity 2014-01-05T19:18:49Z Spending more time looking toward the Milky Way’s heart should also allow Fermi to discover more pulsars, which are thought to be common in the inner galaxy. Center of Attention: Space Telescope May Hone in on Heart of the Milky Way in Hunt for Dark Matter 2013-10-01T11:45:00.790Z This month, a team led by the NRAO’s Scott Ransom reported discovering such a millisecond pulsar. US struggles to offload telescopes 2014-01-29T18:50:39.191Z The new pulsars were found by the distributed computing project Einstein@Home. Home PCs Help Pinpoint Pulsars 2013-09-04T17:15:00.630Z She studies gravitational waves around pulsars, superdense neuron stars that litter the galaxy. Too Big to Fail? The Green Bank Telescope s Uncertain Future 2013-09-04T11:45:00.583Z They found a pulsar with two white dwarfs all packed in a space smaller than Earth's orbit of the Sun. Triple star system clue to gravity 2014-01-05T19:18:49Z X-ray observations later revealed that the nebula harbors a pulsar, the fast-spinning collapsed core of an exploded massive star. The Milky Way Supernova You've Never Heard Of 2013-08-30T11:45:00.500Z This was the pattern for pulsars—rapidly spinning city-size stellar remnants that steadily chirp in radio. A Brilliant Flash, Then Nothing: New Fast Radio Bursts Mystify Astronomers 2013-07-09T18:45:00.693Z It uses idle computing time on the PCs of thousands of volunteer users—like Ig and Rev—to scan telescope data for pulsar signals. Home PCs Help Pinpoint Pulsars 2013-09-04T17:15:00.630Z Other than that, I'm continuing my research on pulsars and magnetars, working with my students. Leader of Turkey's New Science Academy Speaks Out 2013-06-25T18:55:00Z But until now the only known triple system containing a millisecond pulsar was one with a planet as the outer companion, causing only weak gravitational interactions. Triple star system clue to gravity 2014-01-05T19:18:49Z The ultimate energy source for this radiation is the nebula's pulsar. The Milky Way Supernova You've Never Heard Of 2013-08-30T11:45:00.500Z This slowing is consistent with the presence of the high magnetic field that enables the star to radiate energy faster than a normal pulsar. Magnetar Found at Giant Black Hole 2013-05-15T14:15:00.367Z But Ig and Rev were big helps in finding previously unknown pulsars in our own Milky Way galaxy—24 of them. Home PCs Help Pinpoint Pulsars 2013-09-04T17:15:00.630Z Listen to stories on social networking in whales, a pulsar's affirmation of general relativity, monitoring TB in North Korea, and more. [Podcast] Science Podcast: 26 April Show 2013-04-25T17:56:07.770Z "This is the first millisecond pulsar found in such a system, and we immediately recognised that it provides us a tremendous opportunity to study the effects and nature of gravity," Prof Ransom said. Triple star system clue to gravity 2014-01-05T19:18:49Z Physicists also need to ensure that the positrons they are seeing don't emanate from a pulsar, a type of star; that wouldn't be a finding about dark matter. Scientists Find Hint of Dark Matter 2013-04-03T23:25:13Z If pulsars are responsible, theory predicts that the positron fraction should decline steadily at energies above this value. Dark matter: Fractional distillation 2013-04-03T16:48:49Z The other possible origin is that positrons are emitted by rapidly rotated, ultra-dense stars called pulsars, which are scattered throughout the galaxy. Dark matter may be source of exotic space particles, physicist says 2013-04-03T17:38:52Z Images of space: The Vela pulsar, Cassiopeia A supernova, Martian rock and more. Big Bang’s afterglow reveals older universe 2013-03-22T02:40:00Z Such rapidly-spinning bodies are called millisecond pulsars - and are used by astronomers as precision tools for studying gravitational effects and other phenomena. Triple star system clue to gravity 2014-01-05T19:18:49Z Lemonick goes on to write: When my father first told me about the cosmos, astronomers didn’t know about quasars, or black holes, or pulsars. Never Mind Life on Distant Planets. What About Distant Moons? 2012-10-15T13:35:39Z The agenda includes a census of galaxies within 2 billion light-years of Earth, studies of cosmic magnetic fields, searches for black holes, and looks at pulsars and quasars. Australia Completes Powerful New Radio Telescope 2012-10-05T17:55:59Z A pulsar is a kind of neutron star, a stellar corpse left over from a supernova, a giant star explosion that crushes protons with electrons to form neutrons. Alien Planets Circling Pulsars May Leave Electric Trails 2012-10-02T15:15:00.307Z A measurement of a minuscule change in the orbits of rapidly rotating neutron stars called pulsars garnered . Dwarf pair pump out gravity waves 2012-08-29T10:45:07Z And it will zoom in on pulsars, the dead stars that emit beams of radio waves that sweep across the Earth like super-accurate time signals. Nations to share giant telescope 2012-05-25T14:30:22Z And it will zoom in on pulsars, the dead stars that emit beams of radio waves which sweep across the Earth like super-accurate time signals. Decision due on giant telescope 2012-05-25T01:47:58Z In stage one, finding out about the first stars and galaxies that formed in the universe, pulsars and gravitational radiation. Decision time on site for giant radio telescope 2012-05-24T14:28:24Z They are also extremely magnetic—a kind of pulsar known as a magnetaris the most powerful magnet in the universe. Alien Planets Circling Pulsars May Leave Electric Trails 2012-10-02T15:15:00.307Z Professor Bell Burnell was a a postgraduate student at Cambridge when she discovered the first radio pulsars with her thesis supervisor Antony Hewish. The female scientist who took on a man's world 2012-05-23T09:15:34Z Comparing the way both objects wobbled on their orbits let the team calculate the mass of the pulsar itself: an unprecedented 2.04 times the mass of the sun. New Challenge to Einstein Looks Like A Stretch 2012-05-17T14:22:29Z Without this process, millisecond pulsars would be even more extreme, possibly sporting periods under a millisecond. ScienceShot: Braking a Dead Star's Wild Spin 2012-02-02T19:01:00Z The detectors captured individual photons with microsecond precision as they streamed in from a bright pulsar in the Crab Nebula. Superconducting Detectors Offer High-Speed Astronomy 2012-01-25T00:15:00.307Z "In some circumstances, these currents would be almost as strong as those directly generated by the pulsar," Mottez said. Alien Planets Circling Pulsars May Leave Electric Trails 2012-10-02T15:15:00.307Z The bad news is that the pulsars need to be monitored for around 10 years to catch the gravitational waves from those orbiting black holes. Frontier experiments: Tough science 2012-01-04T18:20:13.233Z She quotes Arizona State University physicist Feryal Ozel to the effect that if the next record breaking pulsar weighs in significantly above 2 solar masses, then modifications to general relativity might be in order. New Challenge to Einstein Looks Like A Stretch 2012-05-17T14:22:29Z However, because positrons are produced elsewhere in the universe, including in pulsars and neutron stars, the result was inconclusive at best—although it stirred quite a frenzy. Cosmic Antimatter Excess Confirmed 2011-11-22T21:13:00Z The show includes climate change and species distributions, pulsar gamma ray emissions, the case for 'the Anthropocene,' and more. [Podcast] Science Podcast 2011-10-06T18:26:08.100Z In 1967, for example, early-warning radar in Alaska spotted pulsars — rotating stars that emit a pulsing radio signal — months before any civilian astronomers did. Military data: Shared intelligence 2011-09-21T17:20:24.263Z So Ransom and his fellow enthusiasts are taking what they hope will be a cheaper path: looking at pulsars. Frontier experiments: Tough science 2012-01-04T18:20:13.233Z “Gravity is one item on the list of why this pulsar’s mass could be so high,” he told me. New Challenge to Einstein Looks Like A Stretch 2012-05-17T14:22:29Z I eventually returned for my PhD, working to develop a superconducting camera that will help to capture images of cosmic bodies such as pulsars or exoplanets. Turning point: Jennifer Burney 2011-09-15T02:20:32.560Z When pulsars, as they became named, were discovered in the 1960s, they were nicknamed LGM for "little green men." Scientists Discover a Diamond as Big as a Planet 2011-08-26T10:10:00Z But it's been mostly cannibalized by its pulsar companion, and is now just a shadow of its former self. Diamond World Discovered By Astronomers 2011-08-25T18:15:00.233Z The team hopes to monitor about 20 such pulsars spread all over the sky to look for deviations in their timing caused by very-low-frequency gravity waves contracting or expanding the space-time between them and Earth. Frontier experiments: Tough science 2012-01-04T18:20:13.233Z RadioAstron will also examine pulsars and the outer regions of spiral galaxies in order to get more precise measurements on their rate of rotation and distance from earth. Russian Launch: a Bid for Largest Telescope Ever 2011-07-25T15:57:05Z Researchers are also after some detailed data about pulsars, interstellar plasma and neutron stars in the Milky Way. Giant space scope reaches orbit 2011-07-19T14:03:09Z The fast-spinning star is a pulsar, a superdense chunk of matter left over when a massive star explodes, then collapses in on itself. Scientists Discover a Diamond as Big as a Planet 2011-08-26T10:10:00Z With a powerful enough telescope, irregularities in the measured arrival time of pulses from millisecond pulsars could also mark the presence of gravitational waves passing through the local universe. Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project 2011-05-09T17:15:00.260Z "The second pulsar is located in roughly the same part of the sky, and it's spinning at roughly the same rate," he says. Star (Finding) Power: Einstein@Home Taps Donated PC Graphics Processors to Uncover a Second Pulsar 2011-03-01T23:15:05.257Z Such "pulsar glitches" likely result from brief interactions between the neutron star's solid crust and superfluid interior. Neutron Star Provides Direct Evidence for Bizarre Type of Nuclear Matter 2011-02-25T19:42:29Z And precision astronomy tasks such as pulsar timing require an accurate chart of the planets in order to calibrate for an Earthbound observer's motion through a dynamic solar system. Where's Saturn? Cassini Spacecraft Helping Provide More Accurate Planetary Coordinates 2011-02-01T14:15:26.617Z But the find was part of a major international search designed to look for and study pulsars across the sky — and that search is far from over. Scientists Discover a Diamond as Big as a Planet 2011-08-26T10:10:00Z Those gravitational waves compress and stretch space, and the radio waves passing through it, throwing off the pulsar's usually predictable ticking. Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project 2011-05-09T17:15:00.260Z Given the uncertainty of finding gravitational waves, Allen and his team in 2009 expanded the Einstein@Home program to search for binary pulsars by analyzing radio-wave data from the Arecibo Observatory in Puerto Rico. Star (Finding) Power: Einstein@Home Taps Donated PC Graphics Processors to Uncover a Second Pulsar 2011-03-01T23:15:05.257Z For example, spinning neutron stars called pulsars emit clocklike streams of electromagnetic pulses. Neutron Star Provides Direct Evidence for Bizarre Type of Nuclear Matter 2011-02-25T19:42:29Z You have to persuade them that pulsars or cosmology is interesting.” Academics Making Forays Into Stand-Up Comedy 2010-12-19T22:35:10Z In a widely accepted model, the stage is set for any kind of gamma-ray emissions—steady or short-lived—when electrons hurled from the Crab’s central pulsar encounter strong magnetic fields in the surrounding debris. Crab Nebula Outbursts Shock Astronomers 2010-12-08T19:35:00Z Pulsar populations and the deep universe Cordes's interest in the SKA stems partly from the array's capacity for finding pulsars, highly magnetized stellar remnants spin extremely rapidly. Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project 2011-05-09T17:15:00.260Z Plus, a pulsar doesn’t move much relative to the Earth in the time between its pulses, and the distance it does move over several months is predictable. How to Use a Pulsar to Find Starbucks 2010-11-24T16:09:00Z Others say it will be difficult, if not impossible, to distinguish the dark matter signal from the background violence of pulsars and black holes in the local universe. A Costly Quest for the Dark Heart of the Cosmos 2010-11-17T11:38:00Z To find that pulsar, Bloxton spent hours at her home computer using downloaded software that translates the data gathered by the telescope into graphs. Science students get stars in their eyes 2010-10-05T02:17:00Z Telescopes sensitive to infrared, microwave, gamma ray, x-ray and ultraviolet frequencies led to the discovery of pulsars, quasars, black holes and radiation lingering from the Big Bang itself. Using Earth to Map the Cosmos 2010-06-01T04:19:00Z Pulsars emit a beam of radiation; as a pulsar rotates its beam sweeps across Earth, like a lighthouse panning its light beam across a ship. Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project 2011-05-09T17:15:00.260Z Instead of tracking real pulsars, the Italian team simulated its proposed navigation system on computers by using software that mimics pulsar signals as if they were received at an observatory in Australia. How to Use a Pulsar to Find Starbucks 2010-11-24T16:09:00Z Astronomers have already located about 2,000 pulsars, but there could easily be 10 times that many in just the Milky Way. Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project 2011-05-09T17:15:00.260Z "It's like looking for a needle in a haystack," said Rachel Rosen, director of the student pulsar search program and a Green Bank astronomer. Science students get stars in their eyes 2010-10-05T02:17:00Z A full census of pulsars might even reveal a few oddballs that could reveal gaps in our understanding of gravity. Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project 2011-05-09T17:15:00.260Z But no lighthouse can compete with a pulsar's reliability: The beams of some pulsars sweep through space with a regularity on par with the ticking of an atomic clock. Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project 2011-05-09T17:15:00.260Z "We would love to find a pulsar orbiting around a black hole," CSIRO's Diamond says. Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project 2011-05-09T17:15:00.260Z In return, the students were allowed to operate the Byrd telescope to determine if any of the objects they'd found in their data were actually pulsars. Science students get stars in their eyes 2010-10-05T02:17:00Z Based on mathematical estimates about the distribution of pulsars in the universe, Rosen and other astronomers believe there may be about 30 pulsars hiding in the student data set from the Green Bank telescope. Science students get stars in their eyes 2010-10-05T02:17:00Z Most pulsars emit a constant signal, so the Green Bank astronomers initially dismissed his discovery. Science students get stars in their eyes 2010-10-05T02:17:00Z Their so-called binary pulsar allowed for the indirect confirmation of the existence of gravitational waves, ripples in the fabric of space and time that emanate from the movement of massive bodies. Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project 2011-05-09T17:15:00.260Z But follow-up observations proved it was a "rotating radio transient": a pulsar that switches its signal. Science students get stars in their eyes 2010-10-05T02:17:00Z |
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