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Aug 29, 2022 at 20:17 comment added Carlo Beenakker @bananenheld --- Following Hawking, one can assign to a black hole a radiation temperature, inversely proportional to the black hole's mass. The cosmic background radiation (CMB) has a temperature of 2.7 K. A stellar-mass black hole starts out colder than the CMB, it will absorb CMB radiation, become heavier and then even colder. Converseluy, f the black hole starts out hotter than the CMB, it will emit radiation, become lighter and then hotter, radiating faster until it disappears.
Aug 29, 2022 at 19:13 comment added bananenheld Do black holes only grow if they are colder than the surrounding space? What does this mean exactly?
Aug 29, 2022 at 8:54 vote accept display llvll
Aug 29, 2022 at 8:53 comment added display llvll this is a great answer! thank you. Especially the first paper is very close to what I was asking. And I am happy to hear that my impression was wrong and that this topic is still one of active research for physicists
Aug 28, 2022 at 19:45 history answered Carlo Beenakker CC BY-SA 4.0