High resolution, numerical simulations of 17 cluster-sized dark-matter haloes in eight different cosmologies with and without dynamical dark-energy confirm the picture that core halo densities are imprinted early during their formation by the mean cosmological density. Quite independent of cosmology, halo concentrations have a log-normal distribution with a scatter of ˜0.2 about the mean. We propose a simple scaling relation for halo concentrations in dark-energy cosmologies.
Evolution of dark-matter haloes in a variety of dark-energy cosmologies
DOLAG, KLAUS;MOSCARDINI, LAURO;MENEGHETTI, MASSIMO;TORMEN, GIUSEPPE
2005
Abstract
High resolution, numerical simulations of 17 cluster-sized dark-matter haloes in eight different cosmologies with and without dynamical dark-energy confirm the picture that core halo densities are imprinted early during their formation by the mean cosmological density. Quite independent of cosmology, halo concentrations have a log-normal distribution with a scatter of ˜0.2 about the mean. We propose a simple scaling relation for halo concentrations in dark-energy cosmologies.
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