NOAO > Observing Info > Approved Programs > 2011B-0203
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NOAO > Observing Info > Approved Programs > 2011B-0203 |
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PI: Barbara Anthony-Twarog, University of Kansas, bjat@ku.edu
Address: Physics Department, 1251 Wescoe Hall Dr., 1082 Malott Hall, Lawrence, KS 66045, USA
CoI: Bruce Twarog, Univ. of Kansas
CoI: Constantine Deliyannis, Indiana University
Title: Extended Stromgren Photometry in NGC 2506 and NGC 2204
Abstract:
Open clusters remain invaluable targets for probing evolution on a
galactic scale, as well as testing the finer details of stellar
structure and evolution. Through the application of precision
photometry on the extended Stromgren system, we have derived the
critical parameters of reddening, metallicity, age, and membership for
key clusters, supplying insight into the detailed structure of the
Galactic abundance gradient (Twarog et al. 1997), lending support to an
inside-out development of the disk. These same cluster parameters are
also crucial input in our current attempt to characterize the evolution
of Li as a function of stellar mass, age, and metallicity from the main
sequence through the giant branch using open clusters of intermediate-
age. The temporal evolution of this fragile element not only probes sub-
photospheric structure in a unique way, it supplies a critical
constraint to our understanding of Cosmology. The open clusters of
interest are NGC 2204 and NGC 2506, neither of which have been studied
with intermediate-band photometry.
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 > 2011B-0203 |
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