NOAO >   Observing Info >   Approved Programs >   2010A-0445

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Proposal Information for 2010A-0445


PI: Eric Peng, Peking University, peng@bac.pku.edu.cn
Address: Department of Astronomy, 5 Yiheyuan Road, Beijing 100871, China

CoI: Laura Ferrarese, NRC-Herzberg Institute of Astrophysics
CoI: John Blakeslee, NRC-Herzberg Institute of Astrophysics
CoI: Patrick Cote, NRC-Herzberg Institute of Astrophysics
CoI: Patrick Durrell, Youngstown State University
CoI: John Huchra, Harvard University
CoI: Christopher Mihos, Case Western Reserve University
CoI: Timothy Beers, Michigan State University
CoI: Nick Ball, NRC-Herzberg Institute of Astrophysics
CoI: Stephane Courteau, Queens University
CoI: Pierre-Alain Duc, CEA-Saclay
CoI: Andres Jordan, Pontifica Catolica Universidad de Chile
CoI: Eric Emsellem, CRA-Lyon
CoI: Ariane Lancon, Observatoire astronomique de Strasbourg
CoI: Chengze Liu, Peking Universty
CoI: Lauren MacArthur, NRC-Herzberg Institute of Astrophysics
CoI: Alan McConnachie, NRC-Herzberg Institute of Astrophysics
CoI: Dean McLaughlin, Keele University
CoI: Thomas Puzia, NRC-Herzberg Institute of Astrophysics
CoI: Nelson Caldwell, Harvard-Smithsonian Center for Astrophysics
CoI: Brian Yanny, Fermi National Accelerator Laboratory

Title: NGVS-S: A Comprehensive Spectroscopic Survey of Virgo

Abstract: As the dominant mass concentration in the local Universe and the largest collection of galaxies within ~\!\!35 Mpc, the Virgo cluster has historically played a key role in studies of how galaxies evolve in dense environments. Closer to home, two of the most important Milky Way halo substructures, the Sagittarius (Sgr) stream and the Virgo Overdensity, are also in this region of sky. Building on deep CFHT/Megacam u^*g'r'i'z' imaging from the Next Generation Virgo Survey (NGVS), this proposal capitalizes on the wide field and multiplexing capabilities of MMT/Hectospec to carry out deep spectroscopic observations of the NGVS. Using 21 Hectospec pointings over two semesters, we will obtain spectra for dwarf galaxies, globular clusters, and foreground halo stars over 17 deg^2 around and between Virgo's four most massive ellipticals. The combination of Hectospec and CFHT will provide an unprecedented view of this uniquely important cluster, allowing us to: 1) Characterize the faint end of the galaxy luminosity function within the magnitude range over which current studies significantly disagree, 2) Conduct the first kinematic survey of intracluster GCs in any cluster, and constrain the mass profile and GC velocity ellipsoid in the Virgo subclusters, and 3) Determine the chemodynamical structure of the Sgr stream and Virgo Overdensity in the Milky Way halo.


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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