Cluster number counts dependence on dark energy inhomogeneities and coupling to dark matter

Details Cluster number counts dependence on dark energy inhomogeneities and coupling to dark matter Cluster number counts dependence on dark energy inhomogeneities and coupling to dark matter

2005-04-23

arxiv.org/abs/astro-ph/0504519v4

Mon.Not.Roy.Astron.Soc.371:1373,2006

Astronomy and Astrophysics

Astrophysics

9 pages, 8 figures. Further extensions on section on discriminating models with future surveys. Accepted for publication in Mo

Scientific paper

10.1111/j.1365-2966.2006.10774.x

Cluster number counts can be used to test dark energy models. We investigate dark energy candidates which are coupled to dark matter. We analyze the cluster number counts dependence on the amount of dark matter coupled to dark energy. Further more, we study how dark energy inhomogeneities affect cluster abundances. It is shown that increasing the coupling reduces significantly the cluster number counts, and that dark energy inhomogeneities increases cluster abundances. Wiggles in cluster number counts are shown to be a specific signature of coupled dark energy models. Future observations will possibly detect such oscillations and discriminate among the different dark energy models.

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