NOAO >   Observing Info >   Approved Programs >   2012A-0550

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Proposal Information for 2012A-0550


PI: Sheila Kannappan, University of North Carolina Chapel Hill, sheila@physics.unc.edu
Address: Physics Department, Phillips Hall 290, CB3255, Chapel Hill, NC 27599, USA

CoI: Mark Norris, UNC Chapel Hill
CoI: Kathleen Eckert, UNC Chapel Hill
CoI: Sami Niemi, UNC Chapel Hill
CoI: Martha Haynes, Cornell
CoI: Sadegh Khochfar, MPE
CoI: Andreas Berlind, Vanderbilt
CoI: Amanda Moffett, UNC Chapel Hill
CoI: David Stark, UNC Chapel Hill
CoI: Joe Burchett, UNC Chapel Hill
CoI: Gerald Cecil, UNC Chapel Hill

Title: Toward a Cosmic Mass Census: An Early Science Velocity Function for the RESOLVE Survey

Abstract: The RESOLVE Survey is a volume-limited census of ~1500 galaxies and larger structures in ~53,000 cubic Mpc of the nearby cosmic web, combining (i) dynamical masses from galaxy velocity fields and cluster dispersions and (ii) gas and stellar masses from auxiliary photometric and radio data. Upon completion, RESOLVE will be the first survey to directly determine the fundamental distribution of galaxy internal velocities (the ``velocity function'' or VF) for all galaxy types. Spanning environments from clusters to voids and reaching down to baryonic masses ~10^9 M_sun, RESOLVE will probe the VF across the ``bimodality'' and ``threshold'' mass scales where imprints of quenching and/or extreme-gas richness may appear, dependent on halo clustering. More generally, RESOLVE will provide the first high spectral and spatial resolution spectroscopic database with the broad utility to complement major photometric surveys. We request 5 nights of SOAR gray/dark time with the Goodman Spectrograph, which will enable completion of an initial VF for a key survey subregion designated for early data release.


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 >   2012A-0550

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