@Article{Wagner_etal2010,
author="Wagner, C.
and Verde, L.
and Boubekeur, L.",
title="N-body simulations with generic non-Gaussian initial conditions I: power spectrum and halo mass function",
journal="Journal of Cosmology and Astroparticle Physics",
year="2010",
publisher="Iop Publishing Ltd",
volume="10",
number="10",
pages="022--24pp",
optkeywords="power spectrum; cosmological simulations; initial conditions and eternal universe; galaxy clusters",
abstract="We address the issue of setting up generic non-Gaussian initial conditions for N-body simulations. We consider inflationary-motivated primordial non-Gaussianity where the perturbations in the Bardeen potential are given by a dominant Gaussian part plus a non-Gaussian part specified by its bispectrum. The approach we explore here is suitable for any bispectrum, i.e. it does not have to be of the so-called separable or factorizable form. The procedure of generating a non-Gaussian field with a given bispectrum (and a given power spectrum for the Gaussian component) is not univocal, and care must be taken so that higher-order corrections do not leave a too large signature on the power spectrum. This is so far a limiting factor of our approach. We then run N-body simulations for the most popular inflationary-motivated non-Gaussian shapes. The halo mass function and the non-linear power spectrum agree with theoretical analytical approximations proposed in the literature, even if they were so far developed and tested only for a particular shape (the local one). We plan to make the simulations outputs available to the community via the non-Gaussian simulations comparison project web site http://icc.ub.edu/similar to liciaverde/NGSCP.html.",
optnote="ISI:000283577600013",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=339), last updated on Tue, 22 Mar 2011 10:19:41 +0000",
issn="1475-7516",
doi="10.1088/1475-7516/2010/10/022",
opturl="http://arxiv.org/abs/arXiv:1006.5793",
opturl="https://doi.org/10.1088/1475-7516/2010/10/022",
archivePrefix="arXiv",
eprint="arXiv:1006.5793",
language="English"
}