Where are the X- rays produced that are emitted by quasars and other active galactic nuclei?
A)in the hot gas in an accretion disk around a central black hole
B)in an ionization nebulae of interstellar gas surrounding the accretion disk
C)in fast- moving jets of electrons that are ejected from the active galactic nucleus
D)in dust grains in molecular clouds that encircle the active galactic nucleus
E)all of the above

Question

Quizplus · Accepted Answer

X-rays from quasars and other active galactic nuclei are primarily produced in the hot gas of an accretion disk around a central black hole. While other processes, such as the ionization of interstellar gas and fast-moving jets of electrons, can also produce X-rays, they are not the primary source in these objects. Dust grains in molecular clouds are unlikely to produce significant X-ray emission.

Where Are the X- Rays Produced That Are Emitted by Quasars