Evolution of density perturbations in a realistic universe

Details Evolution of density perturbations in a realistic universe Evolution of density perturbations in a realistic universe

2005-04-20

arxiv.org/abs/gr-qc/0504089v1

Gen.Rel.Grav. 37 (2005) 2063-2082

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

19 pages, 4 figures

Scientific paper

10.1007/s10714-005-0180-2

Prompted by the recent more precise determination of the basic cosmological parameters and growing evidence that the matter-energy content of the universe is now dominated by dark energy and dark matter we present the general solution of the equation that describes the evolution of density perturbations in the linear approximation. It turns out that as in the standard CDM model the density perturbations grow very slowly during the radiation dominated epoch and their amplitude increases by a factor of about 4000 in the matter and later dark energy dominated epoch of expansion of the universe.

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