Hawking predicted black holes evaporate, but we haven't observed it yet experimentally in primordial black holes. Some possibilities why:
* Evaporation events are very faint, very difficult to distinguish from background, or very rare.
* Primordial black holes have already all evaporated. Given that telescopes look deep into the past, they must have evaporated very quickly.
* Primordial black holes have yet to noticeably start evaporating. Perhaps they all gained a lot of mass.
* Primordial black holes never formed.
The above three hint that our model of the Big Bang might be wrong. An interesting conundrum: what happens to a black hole during inflation? Could it get un-blacked? The ultimate irresistible force meets the ultimate immoveable object. It might depend on the structure of the black hole inside the event horizon, whether there actually is a singularity there.
* The theory of general relativity is incorrect at the density regime near an event horizon.
* The theory of quantum vacuum and virtual particles is incorrect.
The above two are some of the most well respected theories in physics.
* Could ultra high energy cosmic rays, especially those beyond the GZK limit, be the products of nearby evaporation events? ("decays of exotic super-heavy particles beyond those known in the Standard Model" -- Wikipedia)
1 comment :
Could this just be a time dilation issue? These black holes could rapidly evaporate in the reference frame of the black hole, but that could correspond to eons in our frame...
Post a Comment