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EnglishWe study the propagation of classical electromagnetic waves on the simplest four-dimensional spherically symmetric metric with a dilaton background field. Solutions to the relevant equations are obtained perturbatively in a parameter which measures the strength of the dilaton field (hence parameterizes the departure from Schwarzschild geometry). The loss of energy from outgoing modes is estimated as a back-scattering process against the dilaton background, which would affect the luminosity of stars with a dilaton field. The radiation emitted by a freely falling point-like source on such a background is also studied by analytical and numerical methods.
| Titolo: | ELECTROMAGNETIC WAVES AROUND DILATONIC STARS AND NAKED SINGULARITIES. | |
| Autore/i: | CASADIO, ROBERTO; S. Fabi; B. Harms | |
| Autore/i Unibo: | ||
| Anno: | 2004 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevD.70.044026 | |
| Abstract: | We study the propagation of classical electromagnetic waves on the simplest four-dimensional spherically symmetric metric with a dilaton background field. Solutions to the relevant equations are obtained perturbatively in a parameter which measures the strength of the dilaton field (hence parameterizes the departure from Schwarzschild geometry). The loss of energy from outgoing modes is estimated as a back-scattering process against the dilaton background, which would affect the luminosity of stars with a dilaton field. The radiation emitted by a freely falling point-like source on such a background is also studied by analytical and numerical methods. | |
| Data prodotto definitivo in UGOV: | 2005-09-23 14:07:22 | |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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http://hdl.handle.net/11585/5556
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