NOAO >   Observing Info >   Approved Programs >   2010A-0112

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Proposal Information for 2010A-0112


PI: Jeffrey Newman, University of Pittsburgh, janewman@pitt.edu
Address: 401-C Allen Hall, 3941 O'Hara St., Pittsburgh, PA 15217, USA

CoI: Benjamin Weiner, Steward Observatory
CoI: Christopher Willmer, Steward Observatory
CoI: Anthony J. Tyson, U.C. Davis
CoI: David Wittman, U.C. Davis
CoI: Michael Strauss, Princeton University
CoI: Matthew Ashby, Harvard-Smithsonian Center for Astrophysics
CoI: Anton Koekemoer, STSCI
CoI: Raja Guhathakurta, U.C. Santa Cruz
CoI: Samuel Schmidt, U.C. Davis
CoI: Stephen Kahn, SLAC
CoI: Dan Matthews, U. Pittsburgh

Title: Y-band Imaging in the Extended Groth Strip

Abstract: The epoch when today's typical red-sequence (early-type) galaxies first appeared is still poorly known, making it difficult to test theories of their formation. Circumstantial evidence suggests that the critical period was between z=1 and z=2. In order to resolve this question, we propose deep (25 AB, 10 sigma) Y-band Subaru Suprime-Cam imaging of 0.5 sq. deg. in the Extended Groth Strip. This data is vital for accurate photometric redshift estimates at 1<z<2, which will allow us to determine when typical, L* red field galaxies started to appear. The Y imaging will also enable a variety of new projects, including an investigation of the nature of X-ray sources detected in deep Chandra imaging that lack counterparts at wavelengths below 1 micron, and the identification of the most luminous z=7 galaxies as z' dropouts in combination with existing data. The Extended Groth Strip already possesses an array of multiwavelength data unparalleled in its depth over such a large area. However, there is a critical gap in depth of photometry between z band and J which Y-band imaging with Suprime-Cam is uniquely suited to fill.


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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