Gauss-Bonnet modification to Hawking evaporation of AdS black holes in massive gravity

TL;DR

This paper investigates how Gauss-Bonnet modifications in massive gravity influence the thermodynamics and evaporation process of AdS black holes, revealing conditions for black hole remnants and the effects of additional parameters.

Contribution

It provides a model-independent framework for black hole evolution in modified gravity, analyzing the impact of Gauss-Bonnet terms on thermodynamic properties and evaporation endpoints.

Findings

Black hole lifetime depends on final temperature

Black holes evaporate completely or form remnants based on parameters

Gauss-Bonnet terms alter thermodynamic behavior and final states

Abstract

The Stefan-Boltzmann law can estimate particle emission power and lifetime of a black hole. However, in modified gravity theories, new parameters in the action can cause qualitative changes in thermodynamic quantities, thus obtaining specific thermodynamic properties often requires complicated calculation with higher degree equations. In this work, we aim to provide a general model-independent description of the evolution of AdS black holes, using Gauss-Bonnet massive gravity as an example. We prove that the impact factor of an infinitely large AdS black hole is equal to the effective AdS radius, and the black hole is able to evaporate an infinite amount of mass in finite time, so that the lifetime of the black hole depends on the final state temperature in the evaporation process. The black hole will evaporate out when the final state temperature diverges and will transform into a remnant when the temperature is zero. Since we have analyzed massive gravity in detail, we can introduce the Gauss-Bonnet term to study how it affects the thermodynamic quantities. We obtain the final states for different parameter intervals, study the qualitative properties of black hole evaporation, and classify the associated cases. This method can also be applied to other models.