The Red-Sequence Cluster Surveys

Details The Red-Sequence Cluster Surveys The Red-Sequence Cluster Surveys

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..379..103y&link_type=abstract

Cosmic Frontiers ASP Conference Series, Vol. 379, proceedings of the conference held 31 July-4 August 2006 at Durham University,

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Scientific paper

The Red-Sequence Cluster Surveys (RCS-1 and RCS-2) are large optical imaging surveys optimized to create well-characterized catalogs of clusters of galaxies up to a redshift of ˜1. We describe our first cosmological analysis, using the self-calibration technique, of a cluster sample of ˜1000 from the 90 sq.~deg RCS-1, using optical richness as a mass proxy. We obtain values for the cosmological parameters Ω_m and σ_8 that are in excellent agreement with the year-three WMAP results. Furthermore, the derived cluster richness-mass relationship is entirely consistent with those measured directly using dynamical mass measurements.
We describe briefly the on-going RCS-2, which is a 1000 sq.~deg survey carried out using the one-square-degree MegaCam on the CFHT. This survey, in z', r and g bands, will produce a cluster sample of several 10^4 clusters up to z˜1, and will allow us to constrain the dark energy equation of state, w, and provide a large cluster sample for the studies of cluster evolution and lensing.

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