Computer Science
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..327w&link_type=abstract
NOAO Proposal ID #2009A-0327
Computer Science
Scientific paper
We propose an extensive spectroscopic survey using GMOS of 10 rich clusters at z 1.1 drawn from the SpARCS IR cluster survey. These data will be used in conjunction with multiwavelength optical/NIR/MIR photometry to study the SFRs, stellar masses, merger rates, and dynamics of galaxies in high-redshift, high-density environments. This project will be the first to use a homogeneously-selected sample of clusters at z > 1, and will build upon the extensive spectroscopic datasets collected by the CNOC1/MORPHS and RCS/EDiSCS surveys at z=0.3 and z=0.7 respectively, providing complementary observations at the highest redshift still observable within the optical window. These data will also be used to study dynamics of clusters during their most active accretion phase, and to determine velocity dispersions, which will allow the first calibration of a mass-richness relation for clusters at z > 1. This project takes advantage of the unique microslit capability of GMOS in band-shuffle mode which allows the compact placement of up to 40 slits in only a 1.7' area. This capability makes GMOS 5 times more efficient than Keck/DEIMOS or VLT/FORS2 at obtaining redshifts within the cluster virial radius at z > 1.
Balogh Micheal
Demarco Ricardo
Ellingson Erica E.
Gardner Jonathan
Gilbank David
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