NOAO >   Observing Info >   Approved Programs >   2009B-0457

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Proposal Information for 2009B-0457


PI: Joaquin D. Vieira, University of Chicago, vieira@uchicago.edu
Address: Kavli Institute for Cosmological Physics, 933 E 56th St, Chicago, IL 60637, USA

CoI: John Carlstrom, University of Chicago / KICP
CoI: Mike Gladders, University of Chicago
CoI: Anthony Gonzalez, University of Florida, Gainsville
CoI: Matthew Malkan, University of California, Los Angeles
CoI: Matthew Ashby, SAO
CoI: Mark Brodwin, SAO
CoI: Daniel Marrone, NRAO / University of Chicago
CoI: Tom Crawford, University of Chicago / KICP

Title: A New Population of Strongly-Lensed High-Redshift Sub-Millimeter Galaxies

Abstract: We propose to obtain RIJK imaging with the 4m Southern Astrophysical Research (SOAR) telescope of 16 millimeter-bright sources discovered by the South Pole Telescope (SPT). We also propose to obtain optical spectroscopy and imaging with the 8m Gemini telescope of an additional 3 sources, also discovered by the SPT, and identified in the Blanco Cosmology Survey (BCS) as strong z>4 candidates via griz photometry. Together, these 19 sources are the empirically brightest and rarest members of the population commonly referred to as sub-millimeter galaxies (SMGs). Our targets are expected to have a higher median redshift than objects currently in the literature. Theoretical estimates suggest that we are detecting a significant number of lensed sources, some of which should lie at z>5. Our proposed photometric observations will allow us to identify the optical counterparts out to z~5 and maximize return by taking advantage of previous imaging of half of these objects by the BCS survey. The proposed observations will provide optical identification, characterization, and spectroscopic redshifts for this unique sample of galaxies. It is likely that one of these candidates will be the highest redshift SMG ever observed.


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