Showing papers by "Oliver Hahn published in 2006"
TL;DR: In this article, the formation histories, shapes and angular momenta of dark-matter haloes depend on the environment, and the spin-orbit correlations are rather strong especially for low-mass haloes in clusters and high-mass Haloes in filaments, where the strongest effect is seen in sheets where halo spins tend to lie within the symmetry of the mass distribution.
Abstract: Using a series of high-resolution N-body simulations of the concordance cosmology we investigate how the formation histories, shapes and angular momenta of dark-matter haloes depend on environment. We first present a classification scheme that allows to distinguish between haloes in clusters, filaments, sheets and voids in the large-scale distribution of matter. This method is based on a local-stability criterion for the orbits of test particles and closely relates to the Zel'dovich approximation. Applying this scheme to our simulations we then find that: i) Mass assembly histories and formation redshifts strongly depend on environment for haloes of mass M
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