Scott Tremaine, “Astrophysical Wonders” (Open Agenda, 2021)
New Books in Science, Technology, and Society
00:00
The Best Explanation for Quasar Power Is Black Hole
The only way they can be made that broad and distorted is from if the gas is emitting from deep in the bottom of vitational gravitational. Well, the arguments can go on, but enough of them are now present, and all the alternative models have become so improbable. It's absolutely clear that by far the best explanation for quasar power is black holes. Once know that, you can calculate how many black holes should be around that used to be shining as quasars,. But maybe have lost their fuel supply, or for one other reason or another, are now dead.
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