NOAO >   Observing Info >   Approved Programs >   2007B-0092

Proposal Information for 2007B-0092

PI: Peter Frinchaboy, University of Wisconsin-Madison, pmf@astro.wisc.edu
Address: Department of Astronomy, 4506 Sterling Hall, 475 N. Charter Street, Madison, WI 53706, USA

CoI: Ata Sarajedini, University of Florida
CoI: Robert Mathieu, University of Wisconsin-Madison
CoI: Aaron Geller, University of Wisconsin-Madison
Abstract: The WIYN Open Cluster Study, or WOCS'', is a project dedicated to comprehensive photometric, astrometric, and spectroscopic studies of a select set of open clusters spanning the range of age and metallicity, with the goals of WOCS of providing a comprehensive and definitive photometric, spectroscopic, and astrometric databases for new fundamental clusters. We propose to map WOCS clusters in the NIR using NEWFIRM on the KPNO 4-m telescope to study the shape and distribution of the luminosity and mass function, as well as mass segregation with age. Additionally, by combining deep NIR and IRAC photometry we are able to provide an individual reddening and extinction allowing non-cluster stars to be removed, producing a cleaned cluster CMD. %. Therefor, we can The value of the wide-field survey photometry derives from the combination of field size and photometric accuracy. In particular, for many of the WOCS clusters the 1-degree field extends to the cluster tidal radii and beyond. Thus the wide-field images will provide a truly comprehensive photometric database for the cluster members. Deep JHK_s photometry is needed data to sample the entire luminosity function of the these prototype'' clusters. Additionally, the combination of optical UBVRI and the proposed JHK_S data will allow us to identify \it photometrically non-equal mass binaries across a wide range of masses, especially for faint lower main sequence stars.