NOAO >   Observing Info >   Approved Programs >   2013A-0529

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Proposal Information for 2013A-0529


PI: R. Michael Rich, UCLA, rmr@astro.ucla.edu
Address: Physics Department, 430 Portola Plaza, Los Angeles, CA 90095-1547, USA

CoI: Andrea Kunder, CTIO
CoI: Christian Johnson, UCLA
CoI: Scott Michael, Indiana University
CoI: Will Clarkson, Indiana University
CoI: Mike Irwin, Institue of Astronomy, Cambridge
CoI: Rodrigo Ibata, Strasbourg Observatory
CoI: Mario Soto, University of La Serena
CoI: Zejko Ivezic, University of Washington
CoI: R. de Propris, ESO
CoI: Annie Robin, besancon Observatory
CoI: Andreas Koch, ZAH-Heidelberg
CoI: Mike Young, Indiana University
CoI: Caty Pilachowski, Indiana University

Title: The Blanco DECam Galactic Bulge Survey

Abstract: We propose a survey of the Southern Galactic bulge and the core of the Sagittarius Dwarf Spheroidal galaxy using the Dark Energy Camera on the Blanco telescope. With its 3 sq. degree field of view, DECam will provide SDSS ugriz photometry spanning the entirety of the bulge, enabling a study of age and metallicity gradients in the main stellar population. This is the only way to determine the resolution of serious apparent contradictions in observations of the bulge. The application of proper motion cleaning will enable identification of non-bulge stars from the thin and thick disk populations, and will also isolate the core of the Sagittarius dwarf spheroidal galaxy, mapping that system. The unprecedented quality of data in bluer filters will improve our definition of the X-shaped structure and test whether metal rich bar stars are primarily responsible for it, as well as testing for the presence of streams or other substructures in the bulge. The u filter will enable a mapping and study of the hot blue horizontal branch in the bulge, as well as enable metallicity/distance/reddening techniques developed for SDSS to be applied to the study of the bulge. A team experienced in both construction of large area maps and with supercomputing access and experience will produce a dataset that will be made available to the public.


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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