NOAO > Observing Info > Approved Programs > 2005A-0399
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NOAO > Observing Info > Approved Programs > 2005A-0399 |
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PI: Michael Gregg, University of California, Davis, gregg@igpp.ucllnl.org
Address: Physics Department, One Shields Ave., Davis, CA 95616, USA
CoI: Michael Drinkwater, University of Queensland
CoI: Arna Karick, University of California, Davis
CoI: Steve Phillipps, Bristol
CoI: Bryn Jones, Queen Mary University of London
CoI: Michael West, University of Hawaii, Hilo
CoI: Patrick Cote, Herzberg Institute of Astrophysics
CoI: Ekaterina Evstigneeva, University of Queensland
CoI: Marianne Takamiya, University of Hawaii, Hilo
CoI: Monica Hasegan, Rutgers University
CoI: John Blakeslee, Johns Hopkins University
CoI: Andres Jordan, European Southern Observatory
CoI: Eric Peng, Herzberg Institute of Astrophysics
Title: Ultra Compact Dwarfs and the Evolution of the Virgo Cluster
Abstract:
We have discovered a new class of galaxy, ``ultra-compact dwarfs,''
inhabiting the Fornax cluster in large numbers. They are so compact
that they are unresolved in ground-based imaging. The UCDs are probably
remnant nuclei of dwarf ellipticals or spirals, liberated through tidal
``threshing'' by the cluster potential, making them a dynamical
evolution yardstick, in addition to being useful test particles for
probing the global cluster potential. We propose a WIYN spectroscopic
search for these objects in the much larger Virgo cluster. The numbers,
distribution, and stellar populations of the UCDs in Virgo will provide
a new window on the forces driving the formation and evolution of large
clusters of galaxies.
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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NOAO > Observing Info > Approved Programs > 2005A-0399 |
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