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B. F. Gerke (University of California, Berkeley), DEEP2 Team
Groups and clusters of galaxies are the basic units of large-scale structure in the universe. By constraining their abundance and evolution with redshift, we may place significant constraints on cosmological parameters. Moreover, identifying galaxies in groups and clusters is essential for fully understanding the effects of local environment on galaxy properties and evolution. However, redshift-space distortions make finding groups and clusters a difficult proposition in any galaxy redshift survey. Deep surveys that cover a broad redshift range, such as DEEP2, are further complicated by evolution of the group population. In this talk, we discuss methods for overcoming such difficulties, and we present an early catalog of high-redshift galaxy groups from the DEEP2 Galaxy Redshift Survey. This catalogue already constitutes the largest spectroscopically selected sample of groups at z ~1.
This work is supported by grants and fellowships from the National Science Foundation.
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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.