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In his book A Brief History of Time, now deceased cosmologist Stephen Hawking talks about coming to the conclusion that “black holes ain’t so black”,the title of chapter seven in this great book, which I suggest you look into.The gist of it is, to my best understanding, based on the nature of virtual( very short lived) particles, that pop into existence from an underlying quantum space.The uncertainty principle dictates that this will happen, in a random manner.Every paticle that pops also has an antiparticle; ( that’s right, it’s made of anti-matter ). Normally, these two opposite particles would annihilate each other in a tiny flash, and that would be that, but in proximity to a black hole, there is a chance for one of those aforementioned particles to” escape” the gravitational pull of the black hole.If I don’t have this completely right, Hawking’s book will sort it out correctly.
Astronomers are hunting for the ultimate proof of Einstein’s theory of general relativity, which is to obtain a direct image of the shadow of a black hole. This is possible by combining radio telescopes spread over the globe using a technique which is called Very Long Baseline Interferometry (VLBI). The participating telescopes are located at high altitudes to minimize the disturbance from the atmosphere and on remote sites with clear skies, allowing to observe the compact radio source Sagittarius A* (Sgr A*) at the centre of the Milky Way. Happy New Year!
It happens on the sub-microscopic scale. Pairs of particles (a nuclear particle and its anti-matter mate) can pop into existence just outside the black hole. You might think of it as energy being extracted from the hole’s intense gravitational field and then converted into matter. At times, one of these newly created particles can disappear into the hole, never to return, while the remaining one stays outside. As a result, the hole’s TOTAL mass energy is reduced just a bit. So, looking at this process over many, many eons, it appears that the black hole is actually evaporating. Ever so slowly, particle by particle, the black hole loses mass.
Black holes will evaporate?