Formation and evaporation of an electrically charged black hole in conformal gravity

TL;DR

This paper investigates the formation and evaporation of electrically charged black holes in conformal gravity, revealing a singularity-free process that results in an extremal remnant with constant charge, and discusses related thermodynamics.

Contribution

It extends previous conformal gravity black hole studies by analyzing charged collapse and evaporation, highlighting singularity avoidance and extremal remnants.

Findings

Black holes formed from charged shells are singularity-free.

Evaporation leads to an extremal remnant with mass equal to charge.

Black hole thermodynamics in conformal gravity are discussed.

Abstract

Extending previous work on the formation and the evaporation of black holes in conformal gravity, in the present paper we study the gravitational collapse of a spherically symmetric and electrically charged thin shell of radiation. The process creates a singularity-free black hole. Assuming that in the evaporation process the charge $Q$ is constant, the final product of the evaporation is an extremal remnant with $M=Q$, which is reached in an infinite amount of time. We also discuss the issue of singularity and thermodynamics of black holes in Weyl's conformal gravity.