We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
DILATON SIGNATURES IN THE ELECTROMAGNETIC SPECTRA OF STARS.
- Authors
CASADIO, ROBERTO; FABI, SERGIO; HARMS, BENJAMIN
- 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 numerical methods.
- Subjects
ELECTROMAGNETIC waves; STELLAR spectra; COSMIC background radiation; BACKSCATTERING; SCATTERING (Physics); FIELD theory (Physics)
- Publication
International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics, 2005, Vol 20, Issue 6, p1103
- ISSN
0217-751X
- Publication type
Article
- DOI
10.1142/S0217751X05023979