On the structure of the ergosurface of Pomeransky-Senkov black rings

TL;DR

This paper investigates the ergosurface structure of Pomeransky-Senkov black rings, revealing its division into inner and outer regions and how the outer ergosurface topology varies with parameters.

Contribution

It provides a detailed analysis of the ergosurface topology and its dependence on parameters for Pomeransky-Senkov black rings.

Findings

Ergosurface splits into inner and outer regions.

Outer ergosurface topology varies with parameters.

Topology of the outer ergosurface depends on specific parameters.

Abstract

We study the properties of the ergosurface of the Pomeransky-Senkov black rings, and show that it splits into an "inner"' and an "outer" region. As for the singular set, the topology of the "outer ergosurface" depends upon the value of parameters.