Mathematics – Logic
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8559e&link_type=abstract
HST Proposal ID #8559
Mathematics
Logic
Hst Proposal Id #8559 Cosmology
Scientific paper
The outer regions of massive clusters represent transitional areas of great cosmological importance where field galaxies encounter the steep potential wells of dark matter and baryonic hot gas. Little is known about either the dark matter profile at large radii or the morphological properties of infalling galaxies at those redshifts where strong evolution is observed in the cluster cores. The former is central to understanding the puzzling high baryonic fraction observed in cluster cores with clear implications for the mean mass density, Omega_o. Understanding the mass distribution on large scales will also help separate cosmological field galaxy evolution from that driven by the environment. To address these questions we propose a wide-field imaging survey of the rich cluster Cl0024+1654 {z=0.40} which takes advantage of an extensive galaxy redshift survey we have compiled. We have designed an efficient sampling strategy which will simultaneously track the gravitational shear to at least 5h_50^-1 Mpc using proven mass reconstruction techniques developed with ground and HST-based data and connect this dark matter profile with the radial dependence of star formation, dynamical and morphological properties of recently- arrived cluster members.
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