NOAO >   Observing Info >   Approved Programs >   2017B-0207

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Program Information for 2017B-0207


PI: Scott Chapman, Dalhousie University, scott.chapman@dal.ca
Address: Coburg Road, Halifax, NS, Canada Canada

CoI: Joaquin Vieira, California Institute of Technology
CoI: Tim Miller, Dalhousie
CoI: Kaja Rotermund, Dalhousie University
CoI: Gil Holder, McGill University
CoI: Kevin Lacaille, McMaster
CoI: Yashar Hezaveh, Stanford U.
CoI: Thomas Greve, University College London
CoI: Daniel Marrone, U. of Arizona
CoI: Manuel Aravena, ESO Chile
CoI: John Carlstrom, U. of Chicago
CoI: Justin Spilker, U. of Arizona
CoI: Brian Stalder, Harvard-Smithsonian Center for Astrophysics
CoI: Matthew Ashby, Harvard-Smithsonian Center for Astrophysics
CoI: Carlos De Breuck, ESO

Title: Optical followup of the SPT2349-56 protocluster at z=4.3

Abstract: We propose to obtain deep GMOS spectroscopy and imaging and Flamingos2 imaging towards the densest protocluster system discovered so far, SPT2349-56 at z=4.3. This system has been recently confirmed, using ALMA in cycle-4, having 13 ULIRGs/SMGs detected in dust-continuum and 10 detected in CO emission within 20" (integrated SFR of ~10^4 Msun/yr). Since it was found in a blind 1.4-mm survey of 2500 deg^2, it is unlikely there are many other systems like these in the entire sky. The proposed observations are thus essential to obtain an unbiased, coherent census of galaxy population in this truly unique protocluster field. Our main goals are to (i) characterize the environment, by identifying Lyman-break galaxies. Given the high density of ULIRGs, we expect to detect a plethora of LBGs at z=4.3. The rich complimentary data will enable a full characterization of their properties; and (ii) probe the stellar masses of both the ULIRGs and the LBGs in the protocluster through deep Ks-band imaging (rest G-band).

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2017B):  GEM-SQ/GMOSS -- 10.4hrs band 1 (GS-2017B-Q-7)


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 >   2017B-0207

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