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V. Desai (University of Washington), L. Simard (Hertzberg Institute of Astrophysics), J. J. Dalcanton (University of Washington), EDiSCS Collaboration
We present the results of a Hubble Space Telescope survey of the ten high redshift clusters from the ESO Distant Cluster Survey (EDiSCS). The EDiSCS sample consists of ten clusters at intermediate redshift (z~0.5) and at high redshift (z~0.8) found in the Las Campanas Cluster Survey, the largest area published optical survey for distant clusters to date. The EDiSCS collaboration has obtained deep, multicolor optical and infrared imaging for each of these clusters. Followup spectroscopy has yielded approximately 50 cluster members per cluster. The HST program consists of 80 orbits divided between ten clusters. Each cluster was imaged over a 3 Mpc x 3 Mpc area in F814W with the Advanced Camera for Surveys (ACS). Four one-orbit pointings tile the entire region. An additional four-orbit pointing on the cluster center yielded an effective exposure time of five orbits on the inner 1.5 Mpc x 1.5 Mpc. Using Luc Simard's automated surface brightness fitting routine, GIM2D, we determined accurate structural properties for a large sample of high redshift cluster galaxies. We present the first results from these efforts, including an analysis of the morphology-color-magnitude relation and the early type fraction in high redshift clusters.
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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.