Can Primordial Black Holes as all Dark Matter explain Fast Radio Bursts?

TL;DR

This paper explores whether primordial black holes could account for all dark matter and simultaneously explain fast radio bursts through magnetic reconnection during collisions with neutron stars, finding a consistent parameter space.

Contribution

It proposes a model linking primordial black holes as dark matter to the generation of fast radio bursts via magnetic reconnection during PBH-NS collisions.

Findings

PBHs as all dark matter are consistent with FRB production rates.

Energy loss during PBH-NS encounters supports their capture.

Parameter space aligns with observed FRB rates.

Abstract

Primordial black holes (PBHs) are one of the most interesting nonparticle dark matter (DM) candidates. They may explain all the DM content in the Universe in the mass regime from about $10^{-14}M_{\odot}$ to $10^{-11}M_{\odot}$. We study PBHs as the source of fast radio bursts (FRBs) via magnetic reconnection in the event of collisions between them and neutron stars (NSs) in galaxies. We investigate the energy loss of PBHs during PBH-NS encounters to model their capture by NSs. To an order-of-magnitude estimation, we conclude that the parameter space of PBHs being all DM is accidentally consistent with that to produce FRBs with a rate which is the order of the observed FRB rate.