Gravitational Cherenkov Radiation from Extended Theories of Gravity
General Relativity and Quantum Cosmology
2012-07-20 v1 High Energy Astrophysical Phenomena
High Energy Physics - Theory
Abstract
We linearize the field equations for higher order theories of gravity that contain scalar invariants other than the Ricci scalar. We find that besides a massless spin-2 field (the standard graviton), the theory contains also spin-0 and spin-2 massive modes with the latter being, in general, ghost modes. The rate at which such particles would emit gravitational Cherenkov radiation is calculated for some interesting physical cases.
Keywords
Cite
@article{arxiv.1206.6681,
title = {Gravitational Cherenkov Radiation from Extended Theories of Gravity},
author = {M. De Laurentis and S. Capozziello and G. Basini},
journal= {arXiv preprint arXiv:1206.6681},
year = {2012}
}
Comments
6 pages, to appear in Mod. Phys. Lett. A. arXiv admin note: text overlap with arXiv:0911.3094, arXiv:1105.6193