NOAO >   Observing Info >   Approved Programs >   2003A-0195

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Proposal Information for 2003A-0195


PI: Patrick Cote, Rutgers University, pcote@physics.rutgers.edu
Address: Department of Physics and Astronomy, 136 Frelinghuysen Road, Piscataway, NJ 08854, USA

CoI: John P. Blakeslee, Johns Hopkins University
CoI: Laura Ferrarese, Rutgers University
CoI: Monica Hasegan, Rutgers University
CoI: Andres Jordan, Rutgers University
CoI: Simona Mei, University of Paris-South
CoI: David Merritt, Rutgers University
CoI: Dean McLaughlin, Space Telescope Science Institute
CoI: Milos Milosavljevic, California Institute of Technology
CoI: Eric Peng, Johns Hopkins University
CoI: John L. Tonry, University of Hawaii
CoI: Michael J. West, University of Hawaii, Hilo

Title: \it The ACS Virgo Cluster Survey: Spectroscopy and Dynamics of Virgo Galaxies

Abstract: We are conducting a major (100 primary + 100 parallel orbits) Cycle 11 \it HST program to obtain multi-color, ACS imaging of 100 early- type galaxies in the Virgo cluster. In terms of depth, uniformity, spatial resolution, and age/metallicity sensitivity, this will be the most comprehensive imaging survey yet undertaken for early-type galaxies and their associated globular cluster systems. Analysis of the ACS data with our own Monte-Carlo and N-body software will yield the most probable merger history of each galaxy, \it provided that we know the total gravitating mass and the mass of the central black hole for each galaxy. Both parameters can be obtained efficiently from ground-based spectroscopy, and we propose to use the KPNO 2.1m and KPNO 4m telescopes to obtain long-slit spectra for the 69 brightest galaxies in our sample. This dataset will yield accurate velocity dispersion profiles, homogeneous ages and metallicities for the program galaxies, and allow the first systematic comparison of star formation and chemical enrichment histories deduced from the galaxies themselves with those derived from their globular cluster systems. \it Given the enormous potential of this dataset, we will disseminate all data and science products from both the ACS and ground-based programs through the project website. In particular, we will make available to the broader community the raw and reduced spectra, velocity dispersion profiles and line index measurements.


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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