Abstract Using the related formula of dynamic black hole, we have calculated the instantaneous radiation energy density of the slowly changing dynamic Kerr--Newman black hole. It is found that the instantaneous radiation energy density of a black hole is always proportional to the quartic of the temperature of the event horizon in the same direction. By using the Hamilton--Jacobin equation of scalar particles in the curved spacetime, the spontaneous radiation of the slowly changing dynamic Kerr--Newman black hole is studied. The energy condition for the occurrence of the spontaneous radiation is obtained.
Received: 01 October 2007
Revised: 25 March 2008
Accepted manuscript online:
PACS:
04.70.Dy
(Quantum aspects of black holes, evaporation, thermodynamics)
Fund: Project supported by
the National Natural Science Foundation of China (Grant No 10773002)
and the Science Foundation
of Heze University of China (Grant No XY06wl01).
Cite this article:
Meng Qing-Miao(孟庆苗), Wang Shuai(王帅), Jiang Ji-Jian(蒋继建), and Deng De-Li(邓德力) Thermal radiation and nonthermal radiation of the slowly changing dynamic Kerr--Newman black hole 2008 Chin. Phys. B 17 2811
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