The white dwarf's gravity can pull hydrogen gas from the companion star's surface.

白矮星的引力可以将氢气从伴星表面拉出来。

The explosions happen because the white dwarf's gravity has pulled material from a companion star.

爆炸的发生是因为白矮星的引力吸引了伴星上的物质。

The closer to companion stars are in binary stellar systems, the faster they rotate relative to each other.

在双星系统中，伴星离得越近，它们彼此相对旋转的速度就越快。

" Usually, we detect them if they are receiving material from a companion star, a process we call accretion, " Bodensteiner said.

“通常，如果它们从伴星接收物质，我们就会检测到它们，我们称之为吸积过程，”博登斯坦纳说。

The researchers believe the companion star will become a black hole and could join with the other one after a long period of time.

研究人员认为，伴星会变成一个黑洞，并在很长一段时间后与另一颗相结合。