Deep Imaging Followup of StaCS z=1 Rich Cluster Candidate

Details Deep Imaging Followup of StaCS z=1 Rich Cluster Candidate Deep Imaging Followup of StaCS z=1 Rich Cluster Candidate

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001noao.prop..194m&link_type=abstract

NOAO Proposal ID #2001A-0194

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The mass function of high-redshift galaxy clusters is a sensitive indicator of cosmological parameters, including the cosmic matter density Ω_m and the shape of primordial density perturbations on scales appropriate to large-scale structure formation. Before this quantity can be measured, however, the general properties of high- redshift clusters must be better determined. The Stanford Cluster Search has detected an interesting cluster candidate, STACS J1058.5- 0340, which appears to be a rich cluster at z ~ 1. Spectroscopic follow-up is scheduled at the Hobby-Eberly telescope (HET), but the ratio of observable cluster galaxies to field galaxies is very small at these distances. Deep imaging of this cluster in V and I bands will allow efficient selection of member galaxies for HET spectroscopy through their color contrast. In addition, the large FOV and good seeing of the WIYN telescope may permit weak lensing analysis of this cluster's mass profile.

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