Modeling Galaxy Clustering by Color

Details Modeling Galaxy Clustering by Color Modeling Galaxy Clustering by Color

2001-08-15

arxiv.org/abs/astro-ph/0108266v2

Mon.Not.Roy.Astron.Soc. 332 (2002) 697

Astronomy and Astrophysics

Astrophysics

8 pages, 9 figures, submitted to MNRAS; minor typos corrected

Scientific paper

10.1046/j.1365-8711.2002.05325.x

We extend the mass-halo formalism for analytically generating power spectra to allow for the different clustering behavior observed in galaxy sub-populations. Although applicable to other separations, we concentrate our methods on a simple separation by rest-frame color into ``red'' and ``blue'' sub-populations through modifications to the relations and halo distribution functions for each of the sub-populations. This sort of separation is within the capabilities of the current generations of simulations as well as galaxy surveys, suggesting a potentially powerful observational constraint for current and future simulations. In anticipation of this, we demonstrate the sensitivity of the resulting power spectra to the choice of model parameters.

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