Addendum to “Radiation emitted by a source orbiting a Schwarzschild–anti–de Sitter black hole”

Abstract

In [J. P. B. Brito et al., Phys. Rev. D 104, 124085 (2021).], we studied the scalar radiation emitted by a source orbiting a Schwarzschild--anti--de Sitter black hole along circular geodesics. We presented results for the emitted power in the context of quantum field theory in curved spacetimes. We computed the emitted power for a region of the parameter space corresponding to large black holes when compared to the anti--de Sitter radius. In this addendum we investigate the regime of small black holes, i.e., the regime of ${M}^{2}\mathrm{\ensuremath{\Lambda}}\ensuremath{\lesssim}0$. In this regime, the emitted power, as a function of the source's angular velocity, exhibits resonant peaks associated with quasinormal frequencies.