The halo mass function redshift dependence

被引:3
作者
Betancort-Rijo, Juan E.
Montero-Dorta, Antonio D.
机构
[1] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain
[2] Univ La Laguna, Dept Astron, E-38200 San Cristobal la Laguna, Spain
关键词
cosmology : theory; dark matter; galaxies : clusters : general; galaxies : halos;
D O I
10.1086/510582
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
It has recently been shown that the correct halo mass function high-mass behavior may be obtained by an appropriate treatment of the all-mass-at-center problem. Here we show that the treatment of this problem leads to an accumulated mass fraction, F, that is not a universal function of the linear variance of the density contrast but depends on the shape of the power spectrum. For relevant power spectra, F is a universal function of two quantities: the linear variance and a quantity related to the local shape (at the given mass scale) of the power spectrum. This implies, for a given shape of the power spectrum, a redshift dependence of the mass function, which is quite important for a cold dark matter power spectrum. Our results are in good agreement with numerical simulations.
引用
收藏
页码:L77 / L80
页数:4
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