Bouncing black holes in quantum gravity and the Fermi gamma-ray excess

TL;DR

This paper proposes that quantum gravity-induced bouncing black holes could explain the Fermi gamma-ray excess from the galactic center, offering a novel astrophysical signature of quantum gravity effects.

Contribution

It introduces a model where bouncing black holes due to quantum gravity can account for the gamma-ray excess, incorporating secondary decay processes and redshift dependence.

Findings

Model explains the Fermi gamma-ray excess

Secondary hadron decay is crucial for the explanation

Redshift dependence distinguishes the model from other sources

Abstract

Non-perturbative quantum-gravity effects can change the fate of black holes and make them bounce in a time scale shorter than the Hawking evaporation time. In this article, we show that this hypothesis can account for the GeV excess observed from the galactic center by the Fermi satellite. By carefully taking into account the secondary component due to the decay of unstable hadrons, we show that the model is fully self-consistent. This phenomenon presents a specific redshift-dependance that could allow to distinguish it from other astrophysical phenomena possibly contributing to the GeV excess.