NOAO >   Observing Info >   Approved Programs >   2011A-0598

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Proposal Information for 2011A-0598


PI: Mark Dickinson, NOAO, med@noao.edu
Address: DPP, 950 N. Cherry Ave., Tucson, AZ 85719, USA

CoI: Emanuele Daddi, CEA/Saclay
CoI: David Elbaz, CEA/Saclay
CoI: Jeyhan Kartaltepe, NOAO
CoI: Naveen Reddy, NOAO
CoI: Daniel Stern, JPL/Caltech
CoI: Min Yun, University of Massachusetts
CoI: Herve Aussel, CEA/Saclay
CoI: Veronique Buat, Laboratoire d'Astrophysique de Marseille
CoI: Stephane Charlot, IAP
CoI: Helmut Dannerbauer, CEA/Saclay
CoI: Mauro Giavalisco, University of Massachusetts
CoI: Ho Seong Hwang, CEA/Saclay
CoI: Anton Koekemoer, STScI
CoI: Glenn Morrison, CFHT/UH
CoI: Casey Papovich, Texas A&M

Title: Spectroscopic confirmation of a population of \em Herschel-selected ultraluminous infrared galaxies at \mathbfz > 3

Abstract: Dust-enshrouded star formation in luminous and ultraluminous infrared galaxies dominates the global cosmic star formation rate at 1 < z < 2, but there is very little direct information about dusty star formation at higher redshifts. Measurements of star formation at z \gg 2 come mainly from UV-selected samples. Using extremely deep far- infrared observations at 100-500(micron) from the GOODS-\em Herschel key program, we have identified a sample of 27 candidate far-IR-selected galaxies at z > 3. If these are all genuinely at their predicted redshifts, their contribution to the globally integrated star formation rate density is nearly as large as that from the Lyman break galaxy population, but spectroscopic validation of their redshifts is essential. We propose DEIMOS spectroscopy to measure redshifts for these remarkable objects, and to confirm (or refute) this large contribution of high redshift dust-enshrouded star formation. Additionally, we will measure redshifts for \em Herschel-selected sources mainly at z < 1.6, pushing toward 100% redshift completeness. At these ``low'' redshifts, only GOODS-\em Herschel detects L_IR^\ast galaxies (\log(L_IR^\ast/L_\odot) ~ 11.8), and reliable redshifts are essential to accurately measure their luminosities, dust temperatures, and to set the stage for further studies of these ``typical ULIRGs'' at the peak era of cosmic star formation.


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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