The General Kerr-de Sitter Metrics in All Dimensions

TL;DR

This paper derives the most general Kerr-de Sitter black hole metrics in all dimensions, providing explicit forms, global structure analysis, and new non-singular Einstein spaces.

Contribution

It presents the general Kerr-de Sitter metrics in arbitrary dimensions with maximal rotation parameters, in Kerr-Schild form, and constructs new Einstein spaces.

Findings

Explicit metrics for all dimensions D≥4

Verification of Einstein equations up to D≤11

Construction of non-singular Einstein spaces

Abstract

We give the general Kerr-de Sitter metric in arbitrary spacetime dimension D\ge 4, with the maximal number [(D-1)/2] of independent rotation parameters. We obtain the metric in Kerr-Schild form, where it is written as the sum of a de Sitter metric plus the square of a null geodesic vector, and in generalised Boyer-Lindquist coordinates. The Kerr-Schild form is simpler for verifying that the Einstein equations are satisfied, and we have explicitly checked our results for all dimensions D\le 11. We discuss the global structure of the metrics, and obtain formulae for the surface gravities and areas of the event horizons. We also obtain the Euclidean-signature solutions, and we construct complete non-singular compact Einstein spaces on associated S^{D-2} bundles over S^2, infinitely many for each odd D \ge 5.