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 / Bartelmann, M.; Dolag, K.; Perrotta, F.; Baccigalupi, C.; Moscardini, L.; Meneghetti, M.; Tormen, G.. - In: NEW ASTRONOMY REVIEWS. - ISSN 1387-6473. - 49:2-6(2005), pp. 199-203. [10.1016/j.newar.2005.01.014]
Evolution of dark-matter haloes in a variety of dark-energy cosmologies
Perrotta, F.;Baccigalupi, C.;
2005-01-01
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.| File | Dimensione | Formato | |
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