Eur. Phys. J. C (2009) 63: 133-138
https://doi.org/10.1140/epjc/s10052-009-1085-0

Regular Article - Theoretical Physics

Hawking radiation of Kerr–Newman–de Sitter black hole

¹ Department of Applied Physics, Xi’an Jiaotong University, Xi’an, 710049, P.R. China
² Institute of Theoretical Physics, Shanxi Datong University, Datong, 037009, P.R. China

^* e-mail: zhaoren2969@yahoo.com.cn

Received: 21 April 2009
Revised: 10 June 2009
Published online: 27 June 2009

Abstract

We extend the classical Damour–Ruffini method and discuss Hawking radiation in Kerr–Newman–de Sitter (KNdS) black hole. Under the condition that the total energy, angular momentum and charge of spacetime are conserved, taking the reaction of the radiation of the particle to the spacetime and the relation between the black hole event horizon and the cosmological horizon into consideration, we derive the black hole radiation spectrum. The radiation spectrum is no longer a pure thermal one. It is related to the change of the Bekenstein–Hawking entropy corresponding the black hole event horizon and the cosmological horizon. It is consistent with the underlying unitary theory.