Regular black holes and black universes
By K. Bronnikov, H. Dehnen, V. Melnikov. 2006
169 citations recorded by the source corpus.
We give a comparative description of different types of regular static, spherically symmetric black holes (BHs) and discuss in more detail their particular type, which we suggest to call black universes. The latter have a Schwarzschild-like causal structure, but inside the horizon there is an expanding Kantowski–Sachs universe and a de Sitter infinity instead of a singularity. Thus a hypothetic BH explorer gets a chance to survive. Solutions of this kind are naturally obtained if one considers static, spherically symmetric distributions of various (but not all) kinds of phantom matter whose existence is favoured by cosmological observations. It also looks possible that our Universe has originated from phantom-dominated collapse in another universe and underwent isotropization after crossing the horizon. An explicit example of a black-universe solution with positive Schwarzschild mass is discussed.
Subfields: Astronomy and Astrophysics, Mathematical Physics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/f8c81df72ef89e422b528efd241a6b5633451248
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Citations in the corpus
- On the viability of regular black holes (2018, background): “In this sense, a rather conservative approach is to take seriously the hypothesis that any successful theory of quantum gravity should be able to remain predictive at the wouldbe singular regions in general relativity [8–10], being capable to provide at least an effective and nonsingular geometric d”
- Regular Black Holes: A Short Topic Review (2023, background): “[27, 52], where the action is cast in the Einstein gravity with a minimally coupled (phantom) scalar field φ,”
- Spherical black holes with regular center: a review of existing models including a recent realization with Gaussian sources (2008, background): “A great variety of these solutions has been investigated (a paper presenting a broad perspective on the subject is [45]) and a very effective classification of them can be found in [24]: we are going to follow this classification scheme and concentrate our attention on existing models of black (3)Th”
- Black holes with scalar hair in light of the Event Horizon Telescope (2020, background): “For an inevitably incomplete list of important studies related to the construction and identification of observational signatures of HBHs in various theories of gravity or in the presence of various different types of matter fields, see for instance [5–54].”