Charged Rotating Black Holes on DGP Brane

TL;DR

This paper derives a charged rotating black hole solution on a DGP brane, revealing a Kerr-Newman-de Sitter type structure with detailed horizon and ergosphere analysis, advancing understanding of black holes in braneworld models.

Contribution

The paper presents a new exact solution for charged rotating black holes on a DGP brane, extending previous models with a Kerr-Schild form and analyzing their horizon and ergosphere structures.

Findings

The solution is of the Kerr-Newman-de Sitter type.

It belongs to the accelerated branch of the DGP model.

Horizon and ergosphere structures are characterized in detail.

Abstract

We consider charged rotating black holes localized on a three-brane in the DGP model. Assuming a $Z_2$-symmetry across the brane and with a stationary and axisymmetric metric ansatz on the brane, a particular solution is obtained in the Kerr-Schild form. This solution belongs to the accelerated branch of the DGP model and has the characteristic of the Kerr-Newman-de Sitter type solution in general relativity. Using a modified version of Boyer-Lindquist coordinates we examine the structures of the horizon and ergosphere.