Hawking radiation from nonrotating singularity-free black holes in conformal gravity

TL;DR

This paper analyzes the sparsity of Hawking radiation from nonrotating, singularity-free black holes in conformal gravity, revealing how conformal parameters influence radiation sparsity.

Contribution

It provides a rigorous bound on the greybody factor and explores how conformal parameters affect Hawking radiation sparsity in these black holes.

Findings

Hawking radiation is extremely sparse from these black holes.

Larger conformal parameters increase radiation sparsity.

Smaller conformal parameters decrease radiation sparsity.

Abstract

We study the sparsity of Hawking radiation from nonrotating singularity-free black holes in conformal gravity. We give a rigorous bound on the greybody factor for massless scalar field and calculate the sparsity of Hawking radiation from the black hole. Besides, we investigate the dependence of the greybody factor and the sparsity of Hawking radiation on the conformal parameters. Our study shows that the Hawking radiation from the black hole is extremely sparse. When the conformal parameters are large, the increase of conformal parameters will lead to an even more sparse Hawking radiation, while to a less sparse Hawking radiation if the conformal parameters are small.