NOAO >   Observing Info >   Approved Programs >   2009A-0311

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Proposal Information for 2009A-0311


PI: Fuyan Bian, University of Arizona, fbian@as.arizona.edu
Address: Steward Observatory, 933 N Cherry Ave., TUCSON, AZ 85721, USA

CoI: Xiaohui Fan, University of Arizona
CoI: Linhua Jiang, University of Arizona
CoI: Arjun Dey, NOAO
CoI: Richard Green, LBTO

Title: \boldmath Clustering of z~3 Lyman Break Galaxies in NOAO Deep Wide Field: Tracing the Evolution of the Large Scale Structure

Abstract: We propose to use GMOS on Gemini-N to carry out multi-object spectroscopic observations of a subset of Lyman Break Galaxies (LBGs) at z~3 in the NOAO Deep Wide Fields Survey (NDWFS) Bootes field. In Spring 2008, we obtained new deep U and Y-band photometry in 7.8 deg^2 of the Bootes field down to 26.0 (5 \sigma) in U band, using the newly commissioned Large Binocular Cameras (LBCs) on the 2\times8.4-m Large Binocular Telescope (LBT). The new U band data, together with deep B_\rm w and R-band images from NWDFS, allow us to select ~20,000 LBG candidates at z~3 down to R~25.5. This is the largest z~3 LBG sample in existence. Photometric redshifts are measured from the LBC+NDWFS UB_\rm wRIY photometry. However, empirical calibration is needed to improve the photo-z determination. With the proposed observations, we will obtain accurate redshifts of ~ 100 LBGs, which properly sample the redshift and luminosity range of our photo-z sample. With this crucial calibration, our large photo-z LBG sample will be a unique dataset to study the clustering of the galaxies at z~3 and to probe the formation and evolution of the large scale structure of the Universe at high redshift.


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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