Particle number density fluctuations and pressure effects on structure formation
Astrophysics
2009-10-31 v2 General Relativity and Quantum Cosmology
Abstract
We provide a covariant and gauge-invariant approach to the question of how a first order pressure can be incorporated self-consistently in a cosmological scenario. The approximation is relevant, in the linear regime, to weakly self-interacting or warm dark matter models. We also derive number density fluctuations in which new modes appear because the number density fluctuations are no longer simply proportional to the density fluctuations.
Cite
@article{arxiv.astro-ph/0008039,
title = {Particle number density fluctuations and pressure effects on structure formation},
author = {D. R. Matravers and J. Triginer},
journal= {arXiv preprint arXiv:astro-ph/0008039},
year = {2009}
}
Comments
10 pages Revtex; revised to match published version