Could Black Holes Survive the Hot Death of the Universe?

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Discussion Overview

The discussion centers on the hot death model of the universe and the potential fate of black holes in such a scenario. Participants explore theoretical implications of a contracting universe, the behavior of matter and radiation, and the possibility of black holes surviving extreme conditions.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant questions whether matter in a contracting universe would coalesce into black holes before extreme temperatures and pressures convert matter into energy.
  • Another participant suggests that in a collapsing universe, spacetime itself would collapse, leading to difficulties in predicting outcomes as the end approaches.
  • A different viewpoint posits that black holes could "eat" surrounding radiation and potentially survive until the end of the universe, speculating that all matter might eventually fall into black holes, leading to a single supermassive black hole.
  • One participant raises the idea that if everything merged into a black hole, it would result in a big bang singularity.
  • There is a suggestion that the scenario could lead to a multitude of "Particle Production Factories," hinting at a possible symmetry reconfiguration of matter and energy.

Areas of Agreement / Disagreement

Participants express differing views on the fate of black holes and the nature of the universe's end, with no consensus reached on whether a big crunch will occur or how black holes would behave under extreme conditions.

Contextual Notes

Participants reference historical events in the universe's timeline, such as the decoupling of photons and the cosmic background radiation, while discussing the implications of black holes in a contracting universe. There are unresolved assumptions regarding the behavior of matter and radiation in extreme conditions.

zanazzi78
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I have a question about the hot death model of the end of the universe.

If the current expansion of the universes was to slow down and eventually the universe started to contract ( I know very unlikely but…) would the matter in the universe coalesce into black holes, before the temperature and pressures got so high as to turn matter into pure energy?

If some/most would then would these super massive black holes be affected by the temperatures and pressures?
 
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That's a tough one, all right. In a collapsing universe, you would still have the illusion that you were at the center of the universe. Some people would find this... unsettling.

In a collapsing universe [at least in principle] spacetime itself would be collapsing. It is difficult to imagine [not to mention calculate] what would happen as the end[?] drew near [aside from it being unpleasant to anything still living]. In the cyclical universe model [at least the model I am most familiar with], another big bang would result.
 
I`m not talking of time scales close to the big crunch.

Am I correct in thinking that when the universe was 300000 years old photos "broke free" from the radiation and flooded out into the expanding universe, we see this in the COBE and MAP images of the Cosmic background radiation.

Going back to a point approximatly 300000 years before a big crunch, matter density would be comparable so would tempareture. Matter would break down, but we now have black holes, where as they didin`t exist at the start of the universe! could they black holes 'eat' the radiation around them and survive to "the end"?

I`m thinking that the big crunch would never happen. That all matter would fall into black holes and that all black holes would merge leaving behind one single super super massice black hole.
 
From what I understand if everything in the universe merged into a black hole at that point you would just have the big bang singularity no?
 
zanazzi78 said:
I`m not talking of time scales close to the big crunch.
Am I correct in thinking that when the universe was 300000 years old photos "broke free" from the radiation and flooded out into the expanding universe, we see this in the COBE and MAP images of the Cosmic background radiation.
Going back to a point approximatly 300000 years before a big crunch, matter density would be comparable so would tempareture. Matter would break down, but we now have black holes, where as they didin`t exist at the start of the universe! could they black holes 'eat' the radiation around them and survive to "the end"?
I`m thinking that the big crunch would never happen. That all matter would fall into black holes and that all black holes would merge leaving behind one single super super massice black hole.


But what you are left with then, is a multitude of Particle Production Factories:

http://www.superstringtheory.com/blackh/blackh3.html

so, there may be some form of 'matter-energy' symmetry "reconfiguration"?
 

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