Gauge-invariant perturbations in a universe with a collisionless gas and a fluid

Details Gauge-invariant perturbations in a universe with a collisionless gas and a fluid Gauge-invariant perturbations in a universe with a collisionless gas and a fluid

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvd..33.1576k&link_type=abstract

Physical Review D (Particles and Fields), Volume 33, Issue 6, 15 March 1986, pp.1576-1584

Mathematics

Logic

21

Origin And Formation Of The Universe

Scientific paper

Bardeen's formalism for cosmological perturbations is extended to a system of a fluid and a collisionless gas which is the best candidate for the dark matter. For the latter, a kinetic approach is taken and the linearized coupled Einstein-Boltzmann equations are derived. When we solve them, no truncation is performed in our formalism. Because of its gauge invariance, this formalism is especially suited to the study of perturbations of the dark matter in an early stage of the Universe, which eventually grow to form the large-scale structure of the Universe.

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