NOAO >   Observing Info >   Approved Programs >   2011A-0539

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Proposal Information for 2011A-0539


PI: Jeyhan Kartaltepe, NOAO, jeyhan@noao.edu
Address: 950 N. Cherry Ave, Tucson, AZ 85719

CoI: Mark Dickinson, NOAO
CoI: Alexandra Pope, University of Massachusetts
CoI: Denis Burgarella, OAMP
CoI: Vassilis Charmandaris, University of Crete
CoI: Emanuele Daddi, CEA-Saclay
CoI: David Elbaz, CEA-Saclay
CoI: Ho Seong Hwang, CEA-Saclay
CoI: Anton Koekemoer, STScI
CoI: Stephanie Juneau, University of Arizona
CoI: Glenn Morrison, CFHT
CoI: James Mullaney, Durham University
CoI: Casey Papovich, Texas A&M University
CoI: Min Yun, University of Massachusetts

Title: Near-Infrared Spectroscopy of \it Herschel-selected ULIRGs in GOODS-N at the Peak of Galaxy Assembly

Abstract: The deepest observations ever taken in the far-infrared (100-500\ (mu)m) have been recently completed by \it Herschel as a part of the GOODS-Herschel key program. We propose to study a sample of ULIRGs detected at these wavelengths at z=2.0-2.6 in GOODS-N by obtaining near-infrared spectroscopy using a two-part strategy. First, we request 3.5 nights on Gemini-North to use GNIRS to obtain continuous spectroscopy in the J, H, and K bands of 12 ULIRGs carefully selected to have spectroscopic redshifts such that all of the key diagnostic emission lines will be observable and unaffected by sky lines. Using standard emission line diagnostic techniques, we will look for signatures of AGN as a function of L_\rm IR, dust temperature, and SED shape and compare the results to those from several other AGN selection methods. This program will allow us to investigate the role of AGN activity at z>2 consistently in a sample not biased by hot- or cold-dust selection for the first time. We also request 3 nights on Subaru using the HK grism on MOIRCS to obtain redshifts for 56 ULIRGs at z=2.0-2.6, a range where spectroscopic redshifts are severely lacking due to the difficulty of obtaining them at optical wavelengths.


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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