Nonthermal radiation of rotating black holes

TL;DR

This paper investigates the nonthermal radiation emitted by rotating Kerr black holes, using a tunneling framework applicable to various particles, and provides refined quantum mechanical results especially for neutrinos.

Contribution

It introduces a semiclassical tunneling approach for nonthermal radiation of Kerr black holes applicable to multiple particle types, including neutrinos, with improved quantum calculations.

Findings

Semiclassical results align with previous findings for photons and gravitons.

Quantum calculations show neutrino radiation is about twice previous estimates.

The approach unifies treatment of different particles in black hole radiation.

Abstract

Nonthermal radiation of a Kerr black hole is considered as tunneling of created particles through an effective Dirac gap. In the leading semiclassical approximation this approach is applicable to bosons as well. Our semiclassical results for photons and gravitons do not contradict those obtained previously. For neutrinos the result of our accurate quantum mechanical calculation is about two times larger than the previous one.