Charged black holes on the Taub-Bolt instanton

TL;DR

This paper presents a new exact five-dimensional Einstein-Maxwell-Dilaton solution describing two charged, static black holes on a Taub-bolt instanton, eliminating conical singularities and analyzing their thermodynamics.

Contribution

It introduces a novel exact solution for charged black holes on a Taub-bolt instanton with complete conical singularity removal and explores their thermodynamic properties.

Findings

Conical singularities can be eliminated in the black hole system.

The solution includes an extremal double-black hole configuration.

Conserved charges and thermodynamics are explicitly computed.

Abstract

We construct a new exact solution of the Einstein-Maxwell-Dilaton field equations in five dimensions, which describes a system of two general charged and static black holes sitting at the two turning points of the Taub-bolt instanton. We show that in this case the conical singularities can be completely eliminated and the black hole system remains in static equilibrium. We show how to recover some of the known solutions in particular cases and also obtain as a new solution the extremal double-black hole solution on the Taub-bolt instanton. Finally, we compute the conserved charges and investigate some of the thermodynamic properties of this system.