The High Redshift Large Scale Structure Survey

Details The High Redshift Large Scale Structure Survey The High Redshift Large Scale Structure Survey

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20719001l&link_type=abstract

American Astronomical Society Meeting 207, #190.01; Bulletin of the American Astronomical Society, Vol. 37, p.1485

Astronomy and Astrophysics

Astronomy

Scientific paper

Previous studies of galaxy clusters at redshifts of z < 1.4 indicate a significant change in the galaxy star formation rates, morphologies, merger rates, and nuclear activity relative to the galaxy populations in local clusters. Theoretical and observational data suggest that the environmental processes which are responsible for this evolution occur far from the cluster centers and are physically associated with infalling groups and filaments. Consequently, it is necessary to look well beyond the regions of traditional study (the cluster cores) to find answers to our questions concerning galaxy evolution. In response, we have undertaken the High Redshift Large Scale Structure (HRLSS) Survey, a systematic search for structure associated with 22 known clusters at z > 0.5. The program utilizes wide-field, multi-band imaging at the Palomar 5-m to detect and wide-field, multi-object spectroscopy at the Keck 10-m to confirm the presence of structure on scales greater than 10 Mpc around well-studied, high-redshift clusters. We present the observational design and scientific objectives of the HRLSS Survey and discuss our first results on the properties of the large scale structures, and the galaxies within them, around four high-redshift clusters.

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