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Massive complex scalar field in the Kerr-Sen geometry: Exact solution of wave equation and Hawking radiation

S. Q. Wu, X. Cai

gr-qcarXiv:gr-qc/0303075

Abstract

The separated radial part of a massive complex scalar wave equation in the Kerr- Sen geometry is shown to satisfy the generalized spheroidal wave equation which is, in fact, a confluent Heun equation up to a multiplier. The Hawking evaporation of scalar particles in the Kerr-Sen black hole background is investigated by the Damour-Ruffini-Sannan method. It is shown that quantum thermal effect of the Kerr-Sen black hole has the same character as that of the Kerr-Newman black hole.

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