According to the theory that active galactic nuclei are powered by supermassive black holes, the high luminosity of an active galactic nucleus primarily consists of .
A)light emitted by hot gas in an accretion disk that swirls around the black hole
B)radio waves emitted from radio lobes found on either side of the galaxy we see in visible light
C)the combined light of thousands of young, high- mass stars that orbit the black hole
D)intense radiation emitted by the black hole itself

Question

Quizplus · Accepted Answer

Active galactic nuclei are thought to be powered by the accretion of matter onto a supermassive black hole at the center of a galaxy. This matter forms an accretion disk around the black hole, where it heats up and emits radiation, including visible light, ultraviolet light, X-rays, and gamma rays. Therefore, the high luminosity of an active galactic nucleus primarily consists of light emitted by hot gas in an accretion disk that swirls around the black hole.

According to the Theory That Active Galactic Nuclei Are Powered