NOAO >   Observing Info >   Approved Programs >   2013B-0541

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Proposal Information for 2013B-0541


PI: Thomas H. Puzia, Pontificia Universidad Catolica de Chile, tpuzia@astro.puc.cl
Address: Departamento de Astronomia y Astrofisica, Casilla 306, Santiago 22, Chile

CoI: Sibilla Perina, Pontificia Universidad Catolica de Chile
CoI: Mirko Simunovic, Pontificia Universidad Catolica de Chile
CoI: Matthew Taylor, Pontificia Universidad Catolica de Chile
CoI: Rodrigo Carrasco, Gemini Observatory
CoI: Bryan Miller, Gemini Observatory
CoI: Peter Pessev, Gemini Observatory
CoI: Ata Sarajedini, University of Florida
CoI: Paul Goudfrooij, Space Telescope Science Institute
CoI: Aaron Dotter, Australian National University

Title: The GeMS/GSAOI Galactic Globular Cluster Survey (G4CS)

Abstract: Galactic globular cluster are crucial laboratories and benchmarks for our understanding of the nearby and distant universe. We will use the GeMS/GSAOI instrument to obtain deep zJHK photometry of all Milky Way globular clusters that were previously observed by the HST/ACS Galactic Globular Cluster Survey in optical filters and that are accessible to GSAOI in period 2013B. With these data we will i) study the morphology of near-IR CMDs and determine the internal consistency of model CMD predictions for various zJHK filter combinations and test the influence of molecular absorption band variations on theoretical isochrone predictions in the near-IR using abundance measurments from high-resolution spectroscopy, ii) derive absolute GC ages with %-level accuracy and corresponding metallicities with uncertainties Delta(Z) 0.1 dex, iii) search for correlations between GC stellar population parameters with global GC properties, such as structural parameters, orbital parameters including 3-D location in the Milky Way, chemical variance of their constituent stellar populations, and iv) use the combined optical/near-IR CMDs to investigate the internal consistency and calibration of various stellar evolution models.


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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