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Type: Artigo de periódico
Title: Pseudo-Newtonian potentials and the radiation emitted by a source swirling around a stellar object
Author: Crispino, LCB
da Cruz, JLC
Letelier, PS
Abstract: We use pseudo-Newtonian potentials to compute the scalar radiation emitted by a source orbiting a stellar object. We compare the results obtained in this approach with the ones obtained via quantum field theory in Schwarzschild spacetime. We find that, up to the marginally stable circular orbit, the potential that better reproduces the Schwarzschild results is the Nowak-Wagoner one. For unstable circular orbits, none of the pseudo-Newtonian potentials considered in our analysis produces satisfactory results. We show that the Paczynski-Wiita potential, the most used in the literature to analyze accretion disks, generates the least satisfactory results for the scalar radiation emitted by the source in circular orbit around a Schwarzschild black hole. (c) 2011 Elsevier B.V. All rights reserved.
Subject: Pseudo-Newtonian potentials
Radiation emission
Black hole
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.physletb.2011.02.037
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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