Primordial non-Gaussianity in density fluctuations

Details Primordial non-Gaussianity in density fluctuations Primordial non-Gaussianity in density fluctuations

2010-02-02

arxiv.org/abs/1002.0503v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 2 figures; in press in the AIP proceedings of the 'Invisible Universe International Conference', UNESCO-Paris, June 2

Scientific paper

We present N-body cosmological numerical simulations including a primordial non-Gaussianity in the density fluctuation field quantified by the non-linear parameter $f_{NL}$. We have used MPGRAFIC code to produce initial conditions and the Adaptive Mesh Refinement (AMR) code RAMSES to evolve the large scale structure formation. We estimated the higher order momenta of the initial distribution of density fluctuations, investigated the redshift evolution of the non-linear power spectrum and estimated the discrepancy introduced by the primordial non-Gaussianity in the non-linear power spectrum.

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