First law of black hole thermodynamics and the weak cosmic censorship conjecture for Kerr-Newman Taub-NUT black holes

TL;DR

This paper explores the thermodynamics and weak cosmic censorship conjecture for Kerr-Newman Taub-NUT black holes, establishing a first law of thermodynamics and analyzing the conditions under which black holes can be destroyed by test particles or scalar fields.

Contribution

It introduces a consistent first law of thermodynamics for Kerr-Newman Taub-NUT black holes and examines their stability against destruction by test particles and scalar fields.

Findings

Extremal black holes cannot be destroyed by charged particles or scalar fields.

Near-extremal black holes with small NUT parameter can be destroyed by charged particles.

Scalar fields cannot destroy near-extremal black holes with small NUT parameter.

Abstract

Stimulated by the recent researches of black hole thermodynamics for black hole with Newman-Unti-Tamburino (NUT) parameter, we investigate the thermodynamics and weak cosmic censorship conjecture for a Kerr-Newman Taub-NUT black hole. By defining the electric charge as a Komar integral over the event horizon, we construct a consistent first law of black hole thermodynamics for a Kerr-Newman Taub-NUT black hole through Euclidean action. Having the first law of black hole thermodynamics, we investigate the weak cosmic censorship conjecture for the black hole with a charged test particle and a complex scalar field. We find that an extremal black hole cannot be destroyed by a charged test particle and a complex scalar field. For a near-extremal black hole with small NUT parameter, it can be destroyed by a charged test particle but cannot be destroyed by a complex scalar field.