Gas can be pulled off a binary companion by a black hole.The black hole's event horizon is too small to allow all the gas to enter perpendicularly,so it orbits in a ring around the black hole or a neutron star.What is this ring called?

Question

Quizplus · Accepted Answer

This ring of gas is known as an accretion disk, which forms when the gas is funneled onto the black hole's event horizon and begins to orbit around it due to its angular momentum. The disk can emit X-rays and other radiation as the gas heats up and undergoes frictional forces while spiraling towards the black hole. The other choices are incorrect: a gas ring is too generic and does not refer specifically to this situation, a Kerr disk refers to a specific type of black hole solution in general relativity, and an ergoregion is a region outside the event horizon where the black hole's spacetime is strongly warped but particles can still escape.

Gas Can Be Pulled Off a Binary Companion by a Black