Fundamental Plane, Morphology-Density Relation, and Lensing in the z=0.83 Cluster MS1054--03

Details Fundamental Plane, Morphology-Density Relation, and Lensing in the z=0.83 Cluster MS1054--03 Fundamental Plane, Morphology-Density Relation, and Lensing in the z=0.83 Cluster MS1054--03

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7372f&link_type=abstract

HST Proposal ID #7372

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Hst Proposal Id #7372 Clusters Of Galaxies

Scientific paper

We propose to obtain a deep mosaic of WFPC2 images for the X- ray selected cluster MS1054-03 at z=0.83. This proposal is the last part of a program to take large HST mosaics of several distant clusters. MS1054-03 extends this study to the highest redshift possible. We augment the HST mosaics of the clusters with extensive ground-based spectroscopy and imaging at the Keck, MMT, NTT, and WHT telescopes. The large areal coverage on the clusters is essential: we can study a large number of galaxies, and determine the radial gradients within the clusters. We have the following scientific goals: {i} We will use the Fundamental Plane of early type galaxies to measure the evolution of the M/L ratio out to z=0.83. This puts strong constraints on the {star} formation epoch of early type galaxies. {ii} We will determine the density-morphology relation at z=0.83, and its evolution from z=0 to z= 0.83. The radial distributions of starburst and post-starburst galaxies, as well as galaxy mergers, will be of particular interest. {iii} We will use weak lensing to derive the detailed mass distribution of this young cluster. MS1054-03 is uniquely suited because it is the most massive of the known high redshift clusters, and it will provide much greater leverage on the evolutionary studies because of its high redshift. The fully processed mosaic of this cluster, covering 5*5 arcmin {1.3times1.3h^-1 Mpc}, will be made available to the astronomical community, with our other cluster mosaics at z=0.33 and z=0.58.

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