Accretion, Primordial Black Holes and Standard Cosmology

TL;DR

This paper investigates how radiation accretion affects the evaporation time of primordial black holes, suggesting that increased accretion could make them viable dark matter candidates by extending their lifespans.

Contribution

It introduces the impact of radiation accretion on primordial black hole evaporation, highlighting its significance for dark matter research.

Findings

Accretion prolongs black hole evaporation time.

Higher accretion efficiency increases the number of surviving primordial black holes.

Primordial black holes could be viable dark matter candidates due to extended lifespans.

Abstract

Primordial Black Holes evaporate due to Hawking radiation. We find that the evaporation time of primordial black holes increase when accretion of radiation is included.Thus depending on accretion efficiency more and more number of primordial black holes are existing today, which strengthens the idea that the primordial black holes are the proper candidate for dark matter.