IAU00712
Presentation type requested: EITHER
THE DEEP2 GALAXY REDSHIFT SURVEY: FIRST CLUSTERING RESULTS
Brian F Gerke
University of California -- Berkeley

The study of groups and clusters of galaxies at high redshift is of great cosmological and astrophysical importance. The comoving abundance of groups and clusters is expected to show evolution that is strongly dependent on fundamental cosmological parameters. Observations of high-redshift clusters also help constrain models of galaxy formation and evolution. The DEEP2 Galaxy Redshift Survey will obtain approximately 50,000 galaxy redshifts at z~1. The survey is particularly well-suited for observations of groups and clusters, since our high spectroscopic resolution allows group velocity dispersions to be measured down to ~200 km/s. Additionally, because we identify galaxy clusters in redshift space, selection effects will be very different from samples based on red galaxy clustering or on the properties of the intracluster gas (X-ray, S-Z). Such observations will make DEEP2 a precision probe of cosmology. For example, the survey is expected to constrain the dark energy equation of state to +/- 0.1 from observations of groups and clusters alone. After discussing such scientific objectives, we will present results on galaxy groups from the first season of DEEP2 observations.

Newman Jeffrey A, Davis Marc , The deep2 team

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