Properties of Dark Matter Haloes in Clusters, Filaments, Sheets and Voids

Details Properties of Dark Matter Haloes in Clusters, Filaments, Sheets and Voids Properties of Dark Matter Haloes in Clusters, Filaments, Sheets and Voids

2006-10-10

arxiv.org/abs/astro-ph/0610280v2

Mon.Not.Roy.Astron.Soc.375:489-499,2007

Astronomy and Astrophysics

Astrophysics

13 pages, 13 figures. Version accepted for publication in MNRAS (references added). Version with high-resolution figures avail

Scientific paper

10.1111/j.1365-2966.2006.11318.x

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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