Eur. Phys. J. C (2018) 78: 116
https://doi.org/10.1140/epjc/s10052-018-5608-4

Regular Article - Theoretical Physics

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

¹ Center for Field Theory and Particle Physics and Department of Physics, Fudan University, Shanghai, 200433, China
² Theoretical Astrophysics, Eberhard-Karls Universität Tübingen, 72076, Tübingen, Germany
³ Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
⁴ Novosibirsk State University, Novosibirsk, Novosibirsk Oblast, 630090, Russia
⁵ Instituto de Física, Universidade de Brasília, Brasília, DF, 70910-900, Brazil

^* e-mail: bambi@fudan.edu.cn

Received: 15 November 2017
Accepted: 1 February 2018
Published online: 8 February 2018

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 , 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.