Impacts of Jets and Winds From Primordial Black Holes

TL;DR

This paper explores how jets and winds from primordial black holes in the early universe could impact their environment and offers new observational tests to detect or constrain their properties, especially in dwarf galaxies.

Contribution

It introduces a novel method to test primordial black holes across a wide mass range by analyzing their jet and wind signatures in dwarf galaxies.

Findings

Jets and winds from PBHs can heat surrounding gas via shocks.

Morphology of emission can distinguish between jets and winds.

Potential to detect spinning PBHs through emission observations.

Abstract

Primordial black holes (PBHs) formed in the early Universe constitute an attractive candidate for dark matter. Within the gaseous environment of the interstellar medium, PBHs with accretion disks naturally launch outflows such as winds and jets. PBHs with significant spin can sustain powerful relativistic jets and generate associated cocoons. Jets and winds can efficiently deposit their kinetic energies and heat the surrounding gas through shocks. Focusing on the Leo T dwarf galaxy, we demonstrate that these considerations can provide novel tests of PBHs over a significant $\sim 10^{-2} M_{\odot} - 10^6 M_{\odot}$ mass range, including the parameter space associated with gravitational wave observations by the LIGO and VIRGO Collaborations. Observing the morphology of emission could allow to distinguish between jet and wind contributions, and hence indirectly detect spinning PBHs.