NOAO > Observing Info > Approved Programs > 2013A-0541
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NOAO > Observing Info > Approved Programs > 2013A-0541 |
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PI: Inger Jorgensen, Gemini Observatory, inger@gemini.edu
Address: Gemini Observatory, 670 N. Aohoku Place, Hilo, HI 96720, USA
CoI: Marcel Bergmann, NOAO
CoI: Richardo Schiavon, Gemini Observatory
CoI: Sune Toft, Dark Cosmology Center, Copenhagen
CoI: Andrew Zirm, Dark Cosmology Center, Copenhagen
CoI: Ruth Gruetzbauch, University of Lisbon, Portugal
CoI: Kristin Chiboucas, Gemini Observatory
Title: RDCS J0848+4453: Stellar populations in a z=1.27 galaxy cluster
Abstract:
We propose to obtain deep optical spectroscopy of galaxies in the rich
cluster RDCSJ0848+4453 (z=1.27). Our proposal is part of a larger project
aimed at constraining models for galaxy evolution in dense environments from
observations of stellar populations in rich z=1.2-2 galaxy clusters. The main
objective is to establish the star formation (SF) history over this epoch
during which large changes in SF rates and galaxy structure are expected to
take place in cluster galaxies. Together with our previous shallower GMOS-N
spectroscopy of RDCSJ0848+4453 the observations proposed here will reach
S/N=20 for galaxies 2.7 mag fainter than the brightest cluster galaxy. The
spectra will be used to determine SF rates, ages and metallicities as well as
measure the velocity dispersions. Combining the spectroscopy with available
HST/ACS imaging, we will test models for evolution of the Fundamental Plane
and of galaxy size. The analysis will also utilize data from the Gemini/HST
Galaxy Cluster Project, which covers rich clusters at z=0.2-1.0. The new E2V
DD CCDs in GMOS make possible this unprecedented probe of distant cluster
galaxies, as no prior stellar population studies based on high S/N spectra
exist for clusters at z>1.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2013A-0541 |
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