Hawking radiation of Kerr-Newman-de Sitter black hole

TL;DR

This paper extends the Damour-Ruffini method to analyze Hawking radiation in Kerr-Newman-de Sitter black holes, showing the spectrum is non-thermal and related to entropy changes, consistent with unitarity.

Contribution

It introduces a generalized approach to Hawking radiation for Kerr-Newman-de Sitter black holes considering horizon interactions and conservation laws.

Findings

The radiation spectrum is non-thermal.

Spectrum depends on entropy changes of horizons.

Results support unitarity in black hole radiation.

Abstract

We extend the classical Damour-Ruffini method and discuss Hawking radiation in Kerr-Newman-de Sitter(KNdS) black hole. Under the condition that the total energy, angular momentum and charge of spacetime are conserved, taking the reaction of the radiation of the particle to the spacetime and the relation between the black hole event horizon and the cosmological horizon into consideration, we derive the black hole radiation spectrum. The radiation spectrum is no longer a pure thermal one. It is related to the change of the Bekenstein-Hawking entropy corresponding the black hole event horizon and the cosmological horizon. It is consistent with an underlying unitary theory.