Addendum: Hawking Radiation of Photons in a Variable-mass Kerr Black Hole

TL;DR

This paper investigates Hawking radiation of photons from a variable-mass Kerr black hole, revealing a new spin-rotation coupling effect that depends on photon helicity states.

Contribution

It introduces a novel analysis of photon Hawking radiation in Kerr black holes with variable mass, highlighting a spin-rotation coupling effect.

Findings

Photon spectrum shows a spin-rotation coupling effect.

The effect depends on photon helicity states.

The spectrum differs from classical blackbody radiation.

Abstract

Hawking evaporation of photons in a variable-mass Kerr space-time is investigated by using a method of the generalized tortoise coordinate transformation. The blackbody radiant spectrum of photons displays a new spin-rotation coupling effect obviously dependent on different helicity states of photons.