Energetics of a rotating charged black hole in 5-dimensional supergravity

TL;DR

This paper explores the complex structure and energetic properties of a five-dimensional charged rotating black hole in supergravity, revealing unique features like dual rotations, charge sensitivity, and ergosphere dynamics.

Contribution

It provides a detailed analysis of the horizon and ergosphere structure of five-dimensional charged rotating black holes, highlighting differences from four-dimensional cases and the impact of charge sign.

Findings

Presence of two rotations coupling to mass and charge

Rich ergosphere structure enabling energy extraction

Metric sensitivity to Maxwell charge sign

Abstract

We investigate the properties of the event horizon and static limit for a charged rotating black hole solution of minimal supergravity theory in (1 + 4) dimension. Unlike the four-dimensional case, there are in general two rotations, and they couple to both mass and charge. This gives rise to much richer structure to ergosphere leading to energy extraction even for axial fall. Another interesting feature is that the metric in this case is sensitive to the sign of the Maxwell charge.