Survival of black holes through a cosmological bounce

Abstract

We analyze whether a black hole can exist and survive in a universe that goes through a cosmological bounce. To this end, we investigate a central inhomogeneity embedded in a bouncing cosmological background modeled by the comoving generalized McVittie metric. Contrary to other dynamical metrics available in the literature, this solution allows for the interaction of the central object with the cosmological fluid. We show that the horizons associated with this metric change with cosmic time because they are coupled to the cosmic evolution as the mass of the central object is always proportional to the scale factor: it decreases during contraction and increases during expansion phases. After a full analysis of the causal structure of this spacetime, we determine that a dynamical black hole persists during the contraction, bounce, and expansion of the universe. This result implies that there is a class of bouncing models that admits black holes at all cosmological epochs. If these models are correct approximation to the real universe, then black holes surviving a cosmic collapse could play some role in the subsequent expanding phase.

11 pages, 7 figures, accepted for publication in Physical Review D

References in corpus (17)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• Primordial Black Holes as Dark Matter: Recent Developments
• A Luminous Quasar at Redshift 7.642
• Pōniuā'ena: A Luminous $z=7.5$ Quasar Hosting a 1.5 Billion Solar Mass Black Hole
• The origins of massive black holes
• Cosmological expansion and local physics
• Cosmology without inflation
• Primordial Black Hole Dark Matter and the LIGO/Virgo observations
• Does the mass of a black hole decrease due to the accretion of phantom energy
• A non inflationary model with scale invariant cosmological perturbations
• The slicing dependence of non-spherically symmetric quasi-local horizons in Vaidya Spacetimes
• Primordial Magnetogenesis in a Bouncing Universe
• Black Holes and Neutron Stars in an Oscillating Universe
• Dynamical black hole in a bouncing universe
• Adversus singularitates: The ontology of space-time singularities
• Black hole in asymmetric cosmological bounce
• Bouncing Cosmologies

Cited by in corpus (2)

• Evolution of black holes through a nonsingular cosmological bounce
• Black holes in a bouncing universe