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Black holes embedded in FLRW cosmologies

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arxiv 2308.07374 v2 pith:TZGJZ4QV submitted 2023-08-14 gr-qc astro-ph.CO

Rudeep Gaur (Victoria University of Wellington) , Matt Visser (Victoria University of Wellington) This is my paper · ORCID
classification gr-qcastro-ph.CO
keywords blackholesclaimedeffectembeddedflrwaccretionallegedly
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There has recently been some considerable interest expressed in a highly speculative model of black hole evolution -- allegedly by a postulated direct coupling between black holes and cosmological expansion independently of accretion or mergers. We wish to make several cautionary comments in this regard -- at least three exact solutions corresponding to black holes embedded in a FLRW background are known, (Kottler, McVittie, Kerr-de Sitter), and they show no hint of this claimed effect -- thereby implying that this claimed effect (if it exists at all) is certainly nowhere near ubiquitous.

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  1. Evaporating cosmologically coupled black holes

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    If a black hole's mass grows with cosmic expansion, Hawking evaporation is slowed or reversed, weakening gamma-ray bounds on primordial black holes.

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