Star Formation in High Redshift Clusters with Spitzer

Details Star Formation in High Redshift Clusters with Spitzer Star Formation in High Redshift Clusters with Spitzer

Mar 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop..268b&link_type=abstract

Spitzer Proposal ID #268

Computer Science

Scientific paper

We propose to study the evolution of star formation in galaxy cluster environments by making measurements at epochs between 0.54 < z < 0.63. We will measure the integrated SFRs for three optically selected galaxy clusters from the ESO Distant Cluster Survey (EDisCS) using MIPS 24micron photometry. We will measure total past SFRs, i.e. stellar masses, from rest-frame near-infrared (near-IR) photometry obtained with IRAC. Two of the three galaxy clusters already have IRAC data. We propose taking new IRAC data for CL1232.5-1250 to complete the set. We have found that H_alpha-derived star-formation rates depend on both cluster mass and redshift (Finn et al. 2004, 2005a), demonstrating the necessity of sampling a large range in mass to disentangle evolutionary trends from trends in mass. Our three targeted clusters span the range in mass from near-group environment to the most massive cluster in the EDisCS sample. This mass range fills the gaps in existing studies, which are dominated by studies of field environments or of very massive clusters.

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