Cosmological Evolution of Black Holes in Brans-Dicke Gravity
Nobuyuki Sakai (Yamagata U.), John D. Barrow (U. of Cambridge)
TL;DR
This paper investigates how black holes evolve over time within an expanding universe modeled by Brans-Dicke gravity, providing exact solutions for different cosmological scenarios.
Contribution
It introduces a modified Swiss cheese model in Brans-Dicke theory to derive exact black hole evolution equations in various universe curvatures.
Findings
Exact black hole evolution solutions for dust and vacuum universes
Black hole radius evolution depends on universe curvature
Application of Misner-Sharp mass in Brans-Dicke cosmology
Abstract
We consider a modified ``Swiss cheese'' model in Brans-Dicke theory, and use it to discuss the evolution of black holes in an expanding universe. We define the black hole radius by the Misner-Sharp mass and find their exact time evolutions for dust and vacuum universes of all curvatures.
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