NOAO > Observing Info > Approved Programs > 2010A-0250
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NOAO > Observing Info > Approved Programs > 2010A-0250 |
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PI: Michael Balogh, University of Waterloo, mbalogh@uwaterloo.ca
Address: Department of Physics and Astronomy, Astronomy Group, Waterloo, Ontario, N2L 3G1, Canada
CoI: Sean McGee, University of Waterloo
CoI: Laura Parker, McMaster University
CoI: Richard Bower, University of Durham
CoI: John Mulchaey, Carnegie Institution of Washington (Carnegie Obs.)
CoI: Alexis Finoguenov, MPE, Garching
CoI: Dave Wilman, MPE, Garching
CoI: Jennifer Connelly, MPE, Garching
Title: The transition of galaxy groups from an invigorating environment to a suffocating one
Abstract:
At low redshift, galaxy groups are hostile environments, gradually shutting
down star formation activity; but at z=1 there is evidence that groups
actually induce star formation in massive galaxies. While much can be learned
about this important process from wide-field, sparsely sampled redshift
surveys, a complementary and necessary approach is to study a smaller, pure
sample of groups in detail. Only then is it possible to robustly measure the
group mass, centre and radius, and the group-to-group variations predicted by
simple infall models. We propose to continue a 3 semester programme begun in
09A, to study galaxies in 16 groups at 0.8<z<1, selected from ultradeep X-ray
observations. With the available data we will be able to measure the
dynamical mass, stellar mass fraction, star formation rate, and the fraction
of "evolved" galaxies in these systems.
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 > 2010A-0250 |
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