The effect of primordial non-Gaussianity on halo bias

Details The effect of primordial non-Gaussianity on halo bias The effect of primordial non-Gaussianity on halo bias

2008-01-31

arxiv.org/abs/0801.4826v2

Astrophys.J.677:L77-L80,2008

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, submitted. Typos fixed, reference added, minor clarifications in the text

Scientific paper

10.1086/587840

It has long been known how to analytically relate the clustering properties of the collapsed structures (halos) to those of the underlying dark matter distribution for Gaussian initial conditions. Here we apply the same approach to physically motivated non-Gaussian models. The techniques we use were developed in the 1980s to deal with the clustering of peaks of non-Gaussian density fields. The description of the clustering of halos for non-Gaussian initial conditions has recently received renewed interest, motivated by the forthcoming large galaxy and cluster surveys. For inflationary-motivated non-Gaussianites, we find an analytic expression for the halo bias as a function of scale, mass and redshift, employing only the approximations of high-peaks and large separations.

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