Tunnelling From G\"odel Black Holes

TL;DR

This paper investigates the properties of Kerr-G"odel black holes, analyzing their spacetime structure, temperature via tunnelling methods, and the constraints on closed timelike curve horizons, providing new insights into their horizon configurations.

Contribution

It offers a detailed analysis of Kerr-G"odel black hole horizons, applying tunnelling methods to compute temperature, and clarifies the relationship between CTC horizons and black hole horizons.

Findings

CTC horizon cannot be between the two black hole horizons

Tunnelling method yields consistent temperature calculations

Discussion of issues when CTC horizon is smaller than black hole horizons

Abstract

We consider the spacetime structure of Kerr-G\"odel black holes, analyzing their parameter space Kerr-G\"odel in detail. We apply the tunnelling method to compute their temperature and compare the results to previous calculations obtained via other methods. We claim that it is not possible to have the CTC horizon in between the two black hole horizons and include a discussion of issues that occur when the radius of the CTC horizon is smaller than the radius of both black hole horizons.