The Halo Mass Function Redshift Dependence

Betancort-Rijo, J. E.; Montero-Dorta, Antonio D.
Referencia bibliográfica

The Astrophysical Journal, Volume 653, Issue 2, pp. L77-L80.

Fecha de publicación:
12
2006
Número de autores
2
Número de autores del IAC
2
Número de citas
3
Número de citas referidas
3
Descripción
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.