X-ray and gamma-ray limits on the primordial black hole abundance from Hawking radiation
Guillermo Ballesteros, Javier Coronado-Blázquez, Daniele Gaggero
Abstract
The non-observation of extragalactic Hawking radiation from primordial black holes of 1016 g sets a conservative strong bound on their cosmological abundance. We revisit this bound and show how it can be improved (both in mass reach and strength) by an adequate modeling of the combined AGN and blazar emission in the MeV range. We also estimate the sensitivity to the primordial black hole abundance of a future X-ray experiment capable of identifying a significantly larger number of astrophysical sources contributing to the diffuse background in this energy range.
Topics & Concepts
PhysicsHawking radiationAstrophysicsBlack hole (networking)Abundance (ecology)Micro black holeBlazarRange (aeronautics)Gamma rayRadiationPrimordial black holeHawkingAstronomyBinary black holeUniverseGravitational waveNuclear physicsBiologyEcologyMaterials scienceRouting (electronic design automation)Composite materialComputer scienceComputer networkRouting protocolLink-state routing protocolCosmology and Gravitation TheoriesQuantum Electrodynamics and Casimir EffectAstrophysics and Cosmic Phenomena