The Radiation Energy Flux and the Radiation Power near the Event Horizon of Slowly Changing Kerr Black Hole

Using the thin film model of black hole and the supposition of part thermal balanced,we studied the radiation energy flux and the radiation power near the event horizon of slowly changing Kerr black hole.It is found that the thermal radiation of Kerr black hole always satisfies the generalized Stefan-Boltzmann law.When the cut-off distance and the thin film thickness are fixed,both the radiation energy flux and the radiation power of slowly changing Kerr black hole are related to the black hole mass and the black hole changing rate of the event horizon.It states that both the gravitational field and the changing rate of the event horizon will affect the thermal radiation of Kerr black hole.