Galaxy Clusters as Probes of Dark Energy

Details Galaxy Clusters as Probes of Dark Energy Galaxy Clusters as Probes of Dark Energy

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006nwap.conf..238v&link_type=abstract

NEW WORLDS IN ASTROPARTICLE PHYSICS. Proceedings of the Fifth International Workshop. Held 8-10 January 2005 in Faro, Portugal.

Physics

Scientific paper

Clusters of galaxies are the most massive virialized structures in the Universe. Given that the mass function of large-scale structures decreases exponentially at the high-mass end, galaxy clusters are a sensitive probe of its normalization and redshift evolution, and hence of the cosmological parameters that most influence it. It will be discussed to what extent the present amplitude of density perturbations, the matter density, and the density and equation of state of the dark energy, can be constrained using observational data on the present and past abundance of galaxy clusters. Current results will be reviewed, and the expected constraints from the XMM-Newton Cluster Survey (XCS) will be presented.

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