Cosmic inflation prevents singularity formation in collapse into a Hayward black hole - INSPIRE

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Cosmic inflation prevents singularity formation in collapse into a Hayward black hole

Michał Bobula
(
- Wroclaw U. and
- Madrid, Inst. Estructura Materia
)

Apr 18, 2024

14 pages

Published in:

Class.Quant.Grav. 42 (2025) 6, 065027,
Class.Quant.Grav. 42 065027

Published: Mar 12, 2025

e-Print:

2404.12243 [gr-qc]

DOI:

10.1088/1361-6382/adbc40

View in:

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Abstract: (IOP)

We construct a (quantum mechanically) modified model for the Oppenheimer–Snyder collapse scenario where the exterior of the collapsing dust ball is a Hayward black hole spacetime and the interior is a dust Friedmann–Robertson–Walker cosmology. This interior cosmology is entirely determined by the junction conditions with the exterior black hole. It turns out to be non-singular, displaying a power-law contraction which precedes a de Sitter phase or, reversely, a power-law expansion followed by a de Sitter era. We demonstrate that cosmic inflation in the collapse setting is a mechanism that decelerates collapsing matter, thereby preventing singularity formation. We also analyse the global causal structure and the viability of the model.

Note:

v3: Accepted for publication in Classical and Quantum Gravity. The title was changed, minor modifications were made to the main text, the appendices were moved to the main text, and Figure 2 was expanded to include the classical OS collapse scenario

black holes
dust collapse
inflation
cosmic singularity
space-time: black hole
collapse
de Sitter
cosmological model: dust
causality
quantum mechanics

References(57)

Figures(2)

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