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19–22 May 2025
Brussels
Europe/Brussels timezone

Towards Accurate Merger Rates of Early Primordial Black Hole Binaries with an Extended Mass Function

22 May 2025, 09:50
20m
Brussels

Brussels

Speaker

Simon Biot (ULB)

Description

The dynamics of early primordial black hole (PBH) binaries with an extended mass distribution are investigated. Specifically, we examine the perturbations and disruptions from the low-mass background population induced by such mass functions. Using dedicated Monte-Carlo simulations, new calculations of the so-called merger rate suppression factors are presented. Our results suggest that the limits on the PBH abundance from gravitational wave observations should be rethought for extended mass distributions and re-open the possibility that a sizable dark matter fraction is constituted of solar-mass PBHs.

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