Scalar radiation emitted from a rotating source around a Reissner-Nordström black hole

Abstract

We investigate the radiation emitted from a scalar source in circular orbit around a Reissner- Nordstr¨om black hole. Particle and energy emission rates are analytically calculated in the low- and high-frequency regimes and shown to be in full agreement with a numerical calculation. Our nvestigation is connected with the recent discussion on the validity of the cosmic censorship conjecture in the quantum realm.