Charged massless scalar fields in a charged -metric black hole: Exact solutions, Hawking radiation, and scattering of scalar waves
arXiv:2401.12454 · doi:10.1103/PhysRevD.110.124065
Abstract
We study Hawking radiation and wave scattering of charged scalar fields in a charged -metric black hole background. The conformally invariant wave equation for charged scalar fields can be separated into radial and angular parts, each with five singularities. We first show that the radial and angular equations can be respectively transformed into the general Heun equation, and then we explore exact solutions of the radial Heun equation in terms of the local Heun functions and connection coefficients. Exact behaviors of the asymptotic wave functions are determined without approximations. We further apply the exact results to derive Hawking radiation, quasinormal modes and superradiance.
arXiv commentV3: 28 pages; eliminated material regarding numerical analysis and implemented other minor corrections; version published in PRD
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