Galaxy M/L Ratios, the Morphology-Density Relation, and Weak Lensing in the z=0.93 Cluster of 3C336

Details Galaxy M/L Ratios, the Morphology-Density Relation, and Weak Lensing in the z=0.93 Cluster of 3C336 Galaxy M/L Ratios, the Morphology-Density Relation, and Weak Lensing in the z=0.93 Cluster of 3C336

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8220f&link_type=abstract

HST Proposal ID #8220

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Hst Proposal Id #8220 Clusters Of Galaxies And Lensing

Scientific paper

We propose to obtain a deep mosaic of WFPC2 images for the radio selected cluster around 3C336 at z=0.93. This proposal is the last part of a program to take large HST WFPC2 mosaics of distant clusters. We augment the HST mosaics of the clusters with extensive ground-based spectroscopy and imaging from the Keck, MMT, ESO-VLT, NTT, and WHT telescopes. The large areal coverage in high-z clusters is essential for studying the whole cluster population, and for determining radial gradients in their properties. We have the following scientific goals: {i} Use the Fundamental Plane of early-type galaxies to measure the evolution of M/L ratios out to z=1, putting strong constraints on the {star} formation epoch of early-type galaxies. {ii} Determine the density-morphology relation at z=1, and its evolution from z=0 to z=1. The radial distributions of starburst and post-starburst galaxies, as well as galaxy mergers, will be of particular interest. {iii} Use weak lensing to derive the detailed mass distribution of the cluster. 3C336 is well suited because it is a massive, high redshift cluster, with a measured velocity dispersion. It will provide great leverage on galactic evolutionary studies because of its high redshift. The fully processed mosaic of this cluster, covering 5*5 arcmin {1.5times1.5h^-2 Mpc}, will be made available to the astronomical community, with our other cluster mosaics at z=0.33, 0.58, and 0.83.

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