A method for identifying a black hole is to:
A)look for voids in the star fields.
B)look for their effects on nearby companions.
C)locate a visible star that disappears when the black hole passes in front of it.
D)search for radio waves from the accretion disk.
E)search for their pulsar signal.

Question

Quizplus · Accepted Answer

The best method for identifying a black hole is to look for its effects on nearby companions. As a black hole consumes material from a companion star, it emits X-rays that can be detected by telescopes. The effects of the black hole's gravity on the companion star can also be observed, such as an increase in the star's orbital speed. One of the best ways to identify a black hole is to observe its effects on nearby companions, such as the distortion of their orbits or the emission of X-rays as material is accreted onto the black hole. Looking for voids in the star fields, locating disappearing stars, searching for radio waves from the accretion disk, or searching for pulsar signals are all potential methods for detecting black holes, but observing their effects on nearby companions is the most reliable and widely used method.

A Method for Identifying a Black Hole Is To