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Old March 24th, 2021, 02:02 PM
Werner Werner is offline
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Originally Posted by mike wightman View Post
Black holes evaporate by emitting photons and other particles, it just takes a really long time for a black hole to evaporate via Hawking radiation.

Stellar mass and larger black holes can not emit Hawking radiation until the temperature of the surrounding universe drops to below the nanoKelvin range - which is a long long time in the future.

A microblack hole can theoretically evaporate in a few nanoseconds but we still await experimental or observational confirmation of this.

You do not need negative mass to explain how black holes evaporate via Hawking radiation.
Then you need tachyons, since the escape velocity at the event horizon is the speed of light, you need something that exceeds that velocity to escape a black hole, or else you need dark energy.
What is dark energy? One form of it is photons that carry negative amounts of energy, they travel at the speed of light just like regular photons do, and be emitting dark energy, you actually gain energy, and whatever absorbs these dark photons loses energy, and in fact a dark photon is just a reverse time regular photon traveling backwards in time.