Abstract
Using the entropy density near the event horizon of Kerr-Newman black hole, the instantaneous radiation energy flux and the instantaneous radiation power of the slowly changing Kerr-Newman black hole have been studied. It is found that the thermal radiation of the Kerr-Newman black hole always satisfies the generalized Stefan-Boltzmann law and is affected by the gravitational field, the electromagnetic field around the black hole and the change of black hole event horizon. But the rate of the change of the event horizon usually makes very little affect on the instantaneous radiation energy flux and radiation power. Only when the rate of the change of the event horizon approaches to the light speed, it can make obviously affect on them.
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Acknowledgements
This work was supported in part by NSFC (No. ZR2011AM020).
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Deng, Dl. The Generalized Stefan-Boltzmann Law of Slowly Changing Kerr-Newman Black Hole. Int J Theor Phys 51, 3490–3494 (2012). https://doi.org/10.1007/s10773-012-1234-3
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DOI: https://doi.org/10.1007/s10773-012-1234-3