NOAO >   Observing Info >   Approved Programs >   2012B-0448

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Proposal Information for 2012B-0448


PI: Paul Thorman, University of California, Davis, thorman@physics.ucdavis.edu
Address: Dept. of Physics, One Shields Ave, Davis, CA 95616, USA

CoI: Christopher Morrison, University of California, Davis
CoI: Russell Ryan, Space Telescope Science Institute
CoI: Samuel J. Schmidt, University of California, Davis
CoI: David Wittman, University of California, Davis
CoI: J. Anthony Tyson, University of California, Davis

Title: Galaxy and Mass Evolution via Deep u-band Imaging in the Deep Lens Survey

Abstract: Deep u-band photometry can powerfully leverage existing deep 0.4- 1 (micron) multi-band imaging by enabling many studies, including novel uses of z ~ 3 Lyman-break galaxies. We propose to use DECam to image 8 deg^2 in two fields of the Deep Lens Survey to u_AB=26.5- 27.3 (5\sigma). The u-band data would complement an existing BVRzJK data set, enabling science that includes: 1) Observing the dark matter distribution and dust absorption as a function of redshift using tomographic magnification of Lyman-break galaxies. 2) Studying the influence of black hole feedback near the QSO/Seyfert boundary. 3) Selecting the low-z analogs of passively evolving galaxies (``BzK galaxies'') to constrain models of their formation and evolution. These deep u-band data, along with the existing Deep Lens Survey data and the improved photo-z catalogs, will enable many other investigations in the combined survey. The data will immediately be made public, with zero proprietary time, and the LSST prototype pipeline reduction will be used, providing an additional method of validating DECam system performance.


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NOAO >   Observing Info >   Approved Programs >   2012B-0448

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