Evolution of dark-matter haloes in a variety of dark-energy cosmologies

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 similar to 0.2 about the mean. We propose a simple scaling relation for halo concentrations in dark-energy cosmologies. (C) 2005 Published by Elsevier B.V.