The environmental dependence of clustering in hierarchical models

Details The environmental dependence of clustering in hierarchical models The environmental dependence of clustering in hierarchical models

2005-09-20

arxiv.org/abs/astro-ph/0509593v1

Mon.Not.Roy.Astron.Soc.364:1327-1336,2005

Astronomy and Astrophysics

Astrophysics

11 pages, 6 figures, MNRAS in press

Scientific paper

10.1111/j.1365-2966.2005.09654.x

In hierarchical models, density fluctuations on different scales are correlated. This induces correlations between dark halo masses, their formation histories, and their larger-scale environments. In turn, this produces a correlation between galaxy properties and environment. This correlation is entirely statistical in nature. We show how the observed clustering of galaxies can be used to quantify the importance of this statistical correlation relative to other physical effects which may also give rise to correlations between the properties of galaxies and their surroundings. We also develop a halo model description of this environmental dependence of clustering.

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