A z=1.2 Cluster from the Spitzer SpARCS Survey

Details A z=1.2 Cluster from the Spitzer SpARCS Survey A z=1.2 Cluster from the Spitzer SpARCS Survey

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop...65e&link_type=abstract

XMM-Newton Proposal ID #05519701

Other

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Elaisn2-117, Xmm-Newton Proposal Id #05519701

Scientific paper

The search for galaxy clusters at z greater than 1 is made difficult by their rarity and relative faintness; to date, only a handful are known, mostly from wide-field X-ray surveys. NIR surveys targeting the galaxy red sequence provide a complementary approach. We propose 50 ksec of EPIC observations of the rich z=1.20 galaxy cluster ELAISN2-117, recently discovered by the 50 square degree SpARCS Survey from Spitzer multi-band IR observations. This cluster is spectroscopically confirmed by 33 galaxy members, has a velocity dispersion of 650 +/- 150 km/sec. Our observations are designed to provide a robust luminosity estimate for comparison with galaxy and gas properties in clusters at low redshift and in the other known clusters at z greater than 1.

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