NOAO >   Observing Info >   Approved Programs >   2014A-0236

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Proposal Information for 2014A-0236


PI: Vithal Tilvi, Texas A&M University, tilvi@physics.tamu.edu
Address: Physics Department, University Drive, College Station, TX 77843, USA

CoI: Casey Papovich, Texas A&M University
CoI: Steven Finkelstein, University of Texas at Austin
CoI: Mark Dickinson, NOAO
CoI: Sandra Faber, UC Santa Cruz/Lick Observatory
CoI: Henry Ferguson, STScI
CoI: Giovanni Fazio, CFA-Harvard
CoI: Brett Salmon, Texas A&M University
CoI: Bahram Mobasher, UC Riverside
CoI: Nicola Mehrtens, Texas A&M
CoI: Anton Koekemoer, STScI
CoI: Mauro Giavalisco, University of Massachusetts
CoI: Rachael Livermore, University of Texas at Austin
CoI: Jonathan Trump, Penn State University

Title: Completing the Galaxy Census from z=0 to z~7 in the CANDELS/COSMOS Field

Abstract: We propose to construct a comprehensive spectroscopic sample of galaxies at 4<z<7 in the CANDELS/COSMOS field - combining these observations with the existing and ongoing surveys at z<4, we will build a complete 3-D view of this field stretching back to the Cosmic Dawn. Through this program we will (1) build a large, homogeneous spectroscopic sample of 4<z<7 in the full CANDELS/COSMOS field-these observations will have a long-lasting legacy value: thanks to the extremely deep HST ACS, WFC3 and Spitzer infrared photometry, (2) measure accurate redshift evolution of \lya fraction (currently highly uncertain due to lack of large spectroscopic samples) providing crucial information about the reionization history of the universe, and bridging the connection between Lyman-break galaxies with and without Lyman-alpha emission lines, and (3) investigate the mass-buildup of z>4 galaxies, which requires precise redshifts to eliminate contamination from the redshifted nebular line fluxes- currently there exists a large discrepancy between observations and theoretical models. In addition, we will obtain detailed properties e.g., \lya line shape, equivalent width distributions, etc. for galaxies at z>4. These observations will further enable extensive archival research and create an excellent sample accessible to ALMA.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2014A-0236

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