Primordial non-Gaussianity in density fluctuations
Cosmology and Nongalactic Astrophysics
2015-05-18 v1 Astrophysics of Galaxies
General Relativity and Quantum Cosmology
Abstract
We present N-body cosmological numerical simulations including a primordial non-Gaussianity in the density fluctuation field quantified by the non-linear parameter . 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.
Cite
@article{arxiv.1002.0503,
title = {Primordial non-Gaussianity in density fluctuations},
author = {F. Fraschetti and J. M. Alimi and J. Courtin and P. S. Corasaniti},
journal= {arXiv preprint arXiv:1002.0503},
year = {2015}
}
Comments
5 pages, 2 figures; in press in the AIP proceedings of the 'Invisible Universe International Conference', UNESCO-Paris, June 29-July 3, 2009