The Most Massive, High Redshift Clusters in the Universe

Details The Most Massive, High Redshift Clusters in the Universe The Most Massive, High Redshift Clusters in the Universe

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010sptz.prop70053b&link_type=abstract

Spitzer Proposal ID #70053

Physics

Scientific paper

We propose to image 95 high-significance (S/N >= 4.5), high redshift galaxy clusters selected via the Sunyaev-Zel'dovich Effect (SZE) over 585 deg2 in the South Pole Telescope SZE survey. The SZE selects clusters on total mass, nearly independently of redshift, and as such produces a valuable sample for studies of massive galaxies in rich environments over a wide range of redshifts. Combined with our existing Spitzer sample, the proposed data will yield 50 massive clusters at z>1. The IRAC data also permit accurate photometric redshifts and stellar mass estimates for both field galaxies and cluster members, allowing studies of the cluster IR luminosity and stellar mass function evolution over the last 10 Gyr in a unique, mass-limited cluster sample. Finally, in concert with our ongoing, extensive multi-wavelength and spectroscopic follow-up programs, the proposed data will allow empirical calibration of the relationship between SZE, X-ray, IR, weak lensing and dynamical measures of cluster mass, which will ultimately allow accurate constraints to be placed on the equation of state of dark energy.

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