Note on nonstationarity and accretion of Primordial Black Holes in Brans-Dicke theory

Abstract

We consider the evolution of primordial black holes by including non-stationarity in their formation process and accretion of radiation in Brans-Dicke theory. Specifically, we focus on how $\eta$, the fraction of the horizon mass the black hole comprises capturing nonstationarity, affects the lifetimes of these primordial black holes. Our calculation reveals that the primordial black hole dynamics is controlled by the product $f\eta$ where $f$ is the accretion efficiency. We also estimate the impact of $\eta$ through $f\eta$ on the primordial black holes' initial mass fraction constraint obtained from the $\gamma$-ray background limit.

arXiv comment3 pages

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• Phantom energy accretion and primordial black holes evolution in Brans-Dicke theory
• Black Hole Dynamics in Power-law based Metric $f(R)$ Gravity
• Vacuum energy and Primordial Black Holes in Brans-Dicke Theory
• Constant-roll inflation and primordial black holes within Barrow entropic framework