Radiation emitted by a source orbiting a Schwarzschild--anti--de Sitter black hole

Abstract

We study the scalar radiation emitted by a source orbiting a Schwarzschild--anti--de Sitter black hole in circular geodesics. We obtain the emitted power using quantum field theory in curved spacetimes at tree level with reflective boundary conditions at infinity. We compare our results with the ones obtained in Schwarzschild and Schwarzschild--de Sitter ($\Lambda >0$) spacetimes. In the Schwarzschild-de Sitter spacetime we observe an enhancement of the emitted power associated to the lower multipole modes, when compared with the Schwarzschild case. In contrast, for the Schwarzschild-anti-de Sitter spacetime, the enhancement is rather of the higher multipole modes.

10 pages, 6 figures

References in corpus (7)

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Cited by in corpus (3)

• Nonminimally coupled scalar field in Schwarzschild--de Sitter spacetime: Geodesic synchrotron radiation
• Electromagnetic radiation from circular orbits in Schwarzschild--de Sitter spacetime
• Multipole decomposition of the gravitational field of a point mass at the black hole horizon