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.

3 pages

References in corpus (3)

• Constraints on the mass spectrum of primordial black holes and braneworld parameters from the high-energy diffuse photon background
• Effect of accretion on primordial black holes in Brans-Dicke theory
• Primordial Black Hole: Mass and Angular Momentum Evolution

Cited by in corpus (1)

• Vacuum energy and Primordial Black Holes in Brans-Dicke Theory