The black hole spin influence on accretion disk neutrino detection

TL;DR

This study investigates how the spin of black holes affects neutrino emissions from accretion disks, impacting their detectability and properties relevant to astrophysical phenomena.

Contribution

It provides the first detailed analysis of black hole spin effects on neutrino surface structure, luminosities, energies, and detection rates across various disk models.

Findings

Spinning black holes produce larger neutrino luminosities and energies.

Observer inclination reduces detection rates but increases average neutrino energies.

Black hole spin significantly influences neutrino emission characteristics.

Abstract

Neutrinos are copiously emitted from black hole accretion disks playing a fundamental role in their evolution, as well as in the production of gamma ray bursts and r-process nucleosynthesis. The black hole generates a strong gravitational field able to change the properties of the emerging neutrinos. We study the influence of the black hole spin on the structure of the neutrino surfaces, neutrino luminosities, average neutrino energies, and event counts at SuperK. We consider several disk models and provide estimates that cover different black hole efficiency scenarios. We discuss the influence of the detector's inclination with respect to the axis of the torus on neutrino properties. We find that tori around spinning black holes have larger luminosities, energies and rates compared to tori around static black holes, and that the inclination of the observer causes a reduction in the luminosities and detection rates but an increase in the average energies.