NGSCP

Non Gaussian Simulations Comparison Project

Given the renewed interest in searching for non-Gaussianity from large-scale structure, there is now the need of a suite of N-body simulations with non-Gaussian initial conditions. Different groups have run and are running cases for the so-called local type non-Gaussianity, while the work for other shapes has just began. The Non-Gaussian Simulations Comparison Project (NGSCP) is an effort to test, compare and benchmark N-body simulations run for (as general as possible) non-Gaussian initial conditions. This effort was prompted by a discussion held during the ESF exploratory workshop “The Almost Gaussian Universe” held in CEA in June 2010.

We envision the comparison to be split in several stages:
Generation of the initial conditions, further subdivided in factorizable (or separable) shapes and non-separable ones.
Simulations settings and convergence.
The outputs we plan to compare at least initially are: Matter power spectrum, Halo power spectrum and Mass function.
As for the moment we are interested in the non-Gaussian correction to the Gaussian quantity (for matter power spectrum, halo power spectrum and mass function), our simulations requirements may be slightly eased.
This page also serves as a repository of simulations outputs from any group who wants to contribute to the project.

Wagner et al. 2010 simulations. Mass function only so far, but several shapes. Halo catalogs also available!
Desjacques et al. simulations. tar file and readme. details can be found in Desjacques, Seljak & Iliev,
MNRAS, 396, 85 (2009) Mass function only for now.
Grossi et al. 2009 simulations Mass function and halo bias, only local shape.
MASS FUNCTION
Here you can find the software to compute the non-gaussian halo mass function following D’Amico, Musso, Norena, Paranjape, JCAP 02 2011. This is still somewhat a beta version so commnets are welcome. For questions contact Jorge Norena.