PT Journal
AU Moretti, F
   Bombacigno, F
   Montani, G
TI Gravitational Landau damping for massive scalar modes
SO European Physical Journal C
JI Eur. Phys. J. C
PY 2020
BP 1203
EP 9pp
VL 80
IS 12
DI 10.1140/epjc/s10052-020-08769-z
LA English
AB 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 Juttner-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.
ER