Spherical Collapse Model

2004/12/27 by Ding-fang Zeng, Zeng, Ding-fang, Yi-hong Gao +1
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0412628

part of the numerical results changed, two typoes corrected

arxiv created 2005/01/06 · arxiv updated 2009/12/01

Abstract

We studied the spherical collapse model in the flat ΛCDM cosmology and provided exact and analytical formulaes for the calculation of the two important parameters in the application of Press-Schechter theory, the critical density contrast and the ratio of cluster/background densities at the virialization point in terms of a media variable which can be solved precisely by numerical methods.

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