Large Scale Structure at z ~ 0.9

Details Large Scale Structure at z ~ 0.9 Large Scale Structure at z ~ 0.9

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8560l&link_type=abstract

HST Proposal ID #8560

Mathematics

Logic

Hst Proposal Id #8560 Cosmology

Scientific paper

We are requesting deep, broad-band red WFPC2 images of three fields within a supercluster at z ~ 0.9 in order to study the morphological properties of galaxies within a high-redshift large scale structure. Because significant evolution has already been observed in galaxy populations at this redshift, these observations will provide a crucial link between the global properties of large scale structure and galaxy-scale physics. The target supercluster contains two clusters which have already been well-studied by the proposers with Keck and HST. CL1604+4304 and CL1604+4321 are typical of Abell richness class 1 to 3 clusters. They are separated by 4100 km s^-1 and by only 7 h_0.7^-1 Mpc. This system is one of only two superclusters that are known at z > 0.9. The proposed HST fields cover the outskirts of the two clusters, as well as the very central supercluster region. These data will be combined with previous HST observations of the cluster cores to generate a complete sample of distant galaxies in a nearly contiguous area corresponding to 1 Mpc * 10 Mpc. The HST imagery, combined with a Palomar/Keck program to obtain photometric and spectroscopic coverage of the same region, will allow us to quantify the morphology--density relation over a wide range of local environments and to study the relationship between galaxies, clusters, and their surrounding large scale structure in the high-redshift universe.

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