Asteroid hits static black hole

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SUMMARY

The discussion centers on the implications of an asteroid impacting a static black hole, specifically a Schwarzschild black hole. It is established that a non-rotating black hole cannot gain angular momentum from an infalling mass, as it would not exist in a static state. The conversation also explores the nature of singularities within black holes, emphasizing that the interior structure of a black hole may differ significantly from that of a Schwarzschild black hole due to quantum effects and the presence of trapped surfaces. The Penrose process is highlighted as a method for extracting energy from rotating black holes, indicating that black holes are never truly static.

PREREQUISITES
  • Understanding of Schwarzschild and Kerr black holes
  • Familiarity with the Penrose process for energy extraction
  • Knowledge of singularity theorems in general relativity
  • Basic concepts of spacetime and angular momentum conservation
NEXT STEPS
  • Research the implications of the Penrose process in rotating black holes
  • Study the differences between Schwarzschild and Kerr black holes
  • Explore the Bardeen model and its implications for black hole physics
  • Investigate the effects of Hawking radiation on black hole properties
USEFUL FOR

Physicists, astrophysicists, and students of general relativity interested in black hole dynamics, energy extraction processes, and the nature of singularities within black holes.

  • #31
timmdeeg said:
the open question is whether or not the energy conditions apply
More precisely, whether they apply under conditions of extreme gravitational collapse. As I think I mentioned, certain quantum field states can violate the energy conditions; the question is whether the conditions encountered in extreme gravitational collapse would induce a kind of phase change that would produce such states. That's likely to remain an open question for a long time since that regime is nowhere near being accessible to our experiments any time soon.
 
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  • #32
timmdeeg said:
That seems to be a quite exotic example. I'm not sure how seriously one should take that.
What you wanted to ask is whether there are more examples in nature of non-compliance with the conditions. The example I gave is within theoretical physics, as I said, and they are exact solutions of Einstein's equations.
 
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