Computer Science
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005noao.prop..344g&link_type=abstract
NOAO Proposal ID #2005B-0344
Computer Science
Scientific paper
For several decades, galaxy clusters have provided both a convenient venue for constraining the epoch of the earliest galaxy formation and the environmental effects on galaxies which have subsequently fallen into the cluster potential. However, a consistent scenario which describes the evolution of all clusters remains elusive. Currently there are not enough data to address systematically the evolution of cluster populations as a function of richness, dynamical state, clustercentric radius, local density, etc. Our program will use photometric redshifts derived from MOSAIC II photometry to pre-select galaxies at the cluster redshift for a well-defind set of clusters, adequately sampling this parameter space. These will then be targeted with our ultraplex spectroscopic survey with IMACS on Magellan. Using the galaxy colours from the imaging data, and line strengths from the spectra, we can probe the star formation histories of statistically significant samples of galaxies in a way not previously possible. We were assigned 4 nights in 2005A and successfully imaged half our sample with MOSAIC II. This semester will allow us to complete our study.
Barrientos Felipe
Ellingson Erica E.
Gilbank David
Gladders Mike
Hoekstra Henk
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