Galileon Radiation from a Spherical Collapsing Shell
High Energy Physics - Theory
2017-01-20 v3 Solar and Stellar Astrophysics
General Relativity and Quantum Cosmology
Abstract
Galileon radiation in the collapse of a thin spherical shell of matter is analyzed. In the framework of a cubic Galileon theory, we compute the field profile produced at large distances by a short collapse, finding that the radiated field has two peaks traveling ahead of light fronts. The total energy radiated during the collapse follows a power law scaling with the shell's physical width and results from two competing effects: a Vainshtein suppression of the emission and an enhancement due to the thinness of the shell.
Cite
@article{arxiv.1605.08277,
title = {Galileon Radiation from a Spherical Collapsing Shell},
author = {Javier Martin-Garcia and Miguel A. Vazquez-Mozo},
journal= {arXiv preprint arXiv:1605.08277},
year = {2017}
}
Comments
23 pages, 3 figures. v3: minor changes, reference added. It matches the version published in Journal of High Energy Physics