Second-order matter perturbations in a LambdaCDM cosmology and non-Gaussianity

Details Second-order matter perturbations in a LambdaCDM cosmology and non-Gaussianity Second-order matter perturbations in a LambdaCDM cosmology and non-Gaussianity

2010-02-19

arxiv.org/abs/1002.3759v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

15 pages. LaTeX file. Invited article for CQG issue on non-linear cosmology

Scientific paper

We obtain exact expressions for the effect of primordial non-Gaussianity on the matter density perturbation up to second order in a LambdaCDM cosmology, fully accounting for the general relativistic corrections arising on scales comparable with the Hubble radius. We present our results both in the Poisson gauge and in the comoving and synchronous gauge, which are relevant for comparison to different cosmological observables.

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