Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 677, Issue 2, Pages L77-L80Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/587840
Keywords
cosmology : theory; galaxies : clusters : general; galaxies : halos large-scale structure of universe
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Funding
- ICREA Funding Source: Custom
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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-Gaussianities, 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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