Quick search Find article
Quick search
Find article

Particle number density fluctuations and pressure effects on structure formation

D R Matravers1 and J Triginer2

Show affiliations


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.


PACS

98.80.-k Cosmology

04.25.-g Approximation methods; equations of motion

95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological)

MSC

83F05 Cosmology

Subjects

Gravitation and cosmology

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 18 (21 September 2001)

Received 25 June 2001

Published 5 September 2001



View by subject




Export






Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.