Speaker
JITUMANI KALITA
(INDIAN INSTITUTE OF TECHNOLOGY, GUWAHATI)
Description
Accretion plays a crucial role in the evolution of primordial black holes (PBHs) in the early Universe. While earlier works focused on Newtonian Bondi-Hoyle models, general relativistic effects become significant in the hot, dense relativistic plasma of the early cosmos. In this study, we consider both relativistic accretion and Hawking evaporation by solving their coupled evolution equations in an expanding background. We present updated constraints on the initial PBH mass spectrum, improved bounds on their abundance, and their contribution to dark matter. We also predict a shift in high-frequency gravitational wave signals due to accretion-driven mass growth.
Author
JITUMANI KALITA
(INDIAN INSTITUTE OF TECHNOLOGY, GUWAHATI)
