Black diholes with unbalanced magnetic charges

TL;DR

This paper introduces a method to generate new Einstein-Maxwell-Dilaton solutions, producing a dihole with unbalanced magnetic charges from the Kerr-NUT solution, and extends it to ten dimensions involving D-branes.

Contribution

It develops a novel technique to derive unbalanced magnetic charge diholes from Kerr-NUT solutions and extends the analysis to higher-dimensional D-brane configurations.

Findings

Generated a new class of dihole solutions with unbalanced magnetic charges.

Connected four-dimensional solutions to ten-dimensional D-brane systems.

Reproduced recent solutions in a new limiting case.

Abstract

We present a technique that can be used to generate a static, axisymmetric solution of the Einstein-Maxwell-Dilaton equations from a stationary, axisymmetric solution of the vacuum Einstein equations. Starting from the Kerr solution, Davidson and Gedalin have previously made use of this technique to obtain a pair of oppositely charged, extremal dilatonic black holes, known as a black dihole. In this paper, we shall instead start from the Kerr-NUT solution. It will be shown that the new solution can also be interpreted as a dihole, but with the black holes carrying unbalanced magnetic charges. The effect of the NUT-parameter is to introduce a net magnetic charge into the system. Finally, we uplift our solution to ten dimensions to describe a system consisting of D6 and anti-D6-branes with unbalanced charges. The limit in which they coincide agrees with a solution recently derived by Brax et al..