Evolution of Black Holes in Brans-Dicke Cosmology
Nobuyuki Sakai (Yamagata U.), John D. Barrow (U. of Cambridge)
TL;DR
This paper investigates how black holes evolve within an expanding universe modeled by Brans-Dicke theory, using a modified Swiss cheese approach and defining black hole size via Misner-Sharp mass.
Contribution
It introduces a modified Swiss cheese model in Brans-Dicke cosmology to analyze black hole evolution, providing new insights into their behavior in alternative gravity theories.
Findings
Black hole radius evolves over time in dust and vacuum universes.
The model offers a framework for understanding black hole dynamics in scalar-tensor theories.
Results highlight differences from general relativity predictions.
Abstract
We consider a modified ``Swiss cheese'' model in the Brans-Dicke theory, and discuss the evolution of black holes in the expanding universe. We define the black hole radius by the Misner-Sharp mass and find the time evolution for dust and vacuum universes.
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Cosmology and Gravitation Theories · Relativity and Gravitational Theory