Spherical Collapse Model
Ding-fang Zeng, Yi-hong Gao
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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