When a black hole is part of a close binary star system,the system may be a strong source of X-rays.Where do the X-rays come from?
A)The companion star,which is heated by the black hole
B)A disk of hot matter around the black hole
C)From the black hole itself
D)From planets that are captured by the black hole

Question

Quizplus · Accepted Answer

The X-rays in close binary star systems with black holes come from a disk of hot matter around the black hole. The matter in the disk is heated to millions of degrees as it spirals inward towards the black hole, emitting intense X-rays in the process.

When a Black Hole Is Part of a Close Binary