Gravitational Landau Damping for massive scalar modes
General Relativity and Quantum Cosmology
2021-01-01 v4 Cosmology and Nongalactic Astrophysics
Astrophysics of Galaxies
High Energy Astrophysical Phenomena
Plasma Physics
Abstract
We establish the possibility of Landau damping for gravitational scalar waves which propagate in a non-collisional gas of particles. In particular, under the hypothesis of homogeneity and isotropy, we describe the medium at the equilibrium with a J\"uttner-Maxwell distribution, and we analytically determine the damping rate from the Vlasov equation. We find that damping occurs only if the phase velocity of the wave is subluminal throughout the propagation within the medium. Finally, we investigate relativistic media in cosmological settings by adopting numerical techniques.
Cite
@article{arxiv.2005.08010,
title = {Gravitational Landau Damping for massive scalar modes},
author = {Fabio Moretti and Flavio Bombacigno and Giovanni Montani},
journal= {arXiv preprint arXiv:2005.08010},
year = {2021}
}
Comments
11 pages, 4 figures. Comments are welcome