Spinning Primordial Black Holes from First Order Phase Transitions

by Indra Kumar Banerjee (Indian Institute of Science, Berhampur (India))

Monday 28 Oct 2024, 14:00 → 15:00 Europe/Rome

AULA GRASSANO

In this talk I explain a novel study we conduct to obtain the initial spin of the primordial black holes created during a first-order phase transition due to delayed false vacuum decay. Remaining within the parameter space consistent with observational bounds, we express the abundance and the initial spin of the primordial black holes as functions of the phase transition parameters. The abundance of the primordial black holes is extremely sensitive to the phase transition parameters. We also find that the initial spin weakly depends on all parameters except the transition temperature.