High Temperature Matter and Gamma Ray Spectra from Microscopic Black Holes

TL;DR

This paper models the high-temperature matter outflow from microscopic black holes using relativistic viscous fluid equations, predicting gamma ray spectra and suggesting observational strategies for detecting such black holes.

Contribution

It introduces a numerical solution for the outflow of matter from microscopic black holes with realistic equations of state, focusing on gamma ray spectra for high-temperature black holes.

Findings

Calculated gamma ray spectra from black hole outflows.

Identified potential observational signatures in gamma ray point sources.

Provided diffuse gamma ray spectrum predictions from galactic black hole distribution.

Abstract

The relativistic viscous fluid equations describing the outflow of high temperature matter created via Hawking radiation from microscopic black holes are solved numerically for a realistic equation of state. We focus on black holes with initial temperatures greater than 100 GeV and lifetimes less than 6 days. The spectra of direct photons and photons from $\pi^0$ decay are calculated for energies greater than 1 GeV. We calculate the diffuse gamma ray spectrum from black holes distributed in our galactic halo. However, the most promising route for their observation is to search for point sources emitting gamma rays of ever-increasing energy.