Black Holes & White Holes - Theoretical Plausibility?

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Discussion Overview

The discussion revolves around the theoretical plausibility of white holes, particularly in the context of a science fiction narrative involving a white hole expelling matter from a parallel universe that contains a black hole. Participants explore various theoretical aspects of white holes and their implications within the framework of general relativity.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions the absence of observable white holes despite the existence of black holes, suggesting that if white holes were real, we should have detected at least one.
  • Another participant proposes that there may be an observable white hole at a great distance, but its matter output would be redshifted, complicating detection.
  • Some participants note that while white holes are theoretically possible under general relativity, no one has proven their existence or how to create them.
  • There is mention of the incompleteness of general relativity, implying that the theoretical framework may allow for possibilities not yet understood.
  • References to concepts like "cosmological natural selection" and "Krasnikov tube" are suggested as potential story ideas related to the topic.

Areas of Agreement / Disagreement

Participants express a range of views on the plausibility of white holes, with some acknowledging their theoretical possibility while others emphasize the lack of evidence for their existence. The discussion remains unresolved regarding the feasibility of the proposed scenario in the context of established physics.

Contextual Notes

Limitations include the dependence on current understandings of general relativity, which some participants argue is incomplete, and the unresolved nature of the existence of white holes.

connectivity
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Hello all,
I am an amateur science fiction writer and have been doing some research on the theories behind white a black holes. I am currently working on a storyline that involves a white hole in one universe which expelling vast amounts of matter from a parallel universe in which it is a black hole.
Is this a theoretically plausible scenario? Even if not, as I have a very limited science background I would be absolutely fascinated to hear what any of you think of this idea.


Regards,
C
 
Astronomy news on Phys.org
I am certainly no expert but this article may be of interest to you: http://www.physorg.com/news189792839.html Were the theory in this article true though, I wonder why we have not discovered any bodies that continually produce matter from within such as a white hole. We have millions of black holes that last for billions of years - one would think that we would too have at least one white hole spewing matter into the universe. In any case, best of luck with your book.
 
As a science fiction reader, I'd say there is one observable white hole at 13.5 billion light years distance. By time we see the matter output of the white hole is is redshifted to CMB temperatures. That means we are inside the white hole. Alernately, you could say we are seeing the output of a new white whole closer in but correspondingly weaker. However we'd still have to be inside the white hole.

Why don't we see any white holes from the outside? Can we? If a white hole is equivalent to a creation event, it will expand at the speed of light just as our universe is expanding at the speed of light. A white hole should repel gravitationally, so we would see nearby stars as distorted with a negative lens. If the white hole is expanding, it will hit you before you see it coming. I don't think our universe could role with that punch.

If the expanding white hole didn't interact without universe, we'd have no way to detect it no instrument to take a measurement of it.

Unless
 
connectivity said:
Is this a theoretically plausible scenario? Even if not, as I have a very limited science background I would be absolutely fascinated to hear what any of you think of this idea.

One good thing about science fiction is that you get to make up your own physics. :-) :-)

The current situation is that no one has figured out how to make the thing that you described, but no one has proven that you can't do it within the rules of general relativity, and we know that GR is incomplete.

If you want some ideas for stories google for Leo Smolin and "cosmological natural selection." Also see Krasnikov tube.
 
White holes are a theoretical possibility under einstein's theories. None have been detected to date. Just another example of a theoretically possible entity not known to exist in our universe. It remains possible, merely unlikely.
 
Thanks for all the great info and feedback!
 

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