NOAO >   Observing Info >   Approved Programs >   2000B-0010

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Proposal Information for 2000B-0010


PI: Philip Massey, KPNO/NOAO, massey@noao.edu
Address: PO 26732, Tucson, AZ 85726-6732, USA

CoI: Paul Hodge, Dept of Astronomy, University of Washington
CoI: George Jacoby, KPNO/NOAO
CoI: Nichole King, STScI
CoI: Knut Olsen, CTIO/NOAO
CoI: Abhijit Saha, KPNO/NOAO
CoI: Chris Smith, CTIO/NOAO

Title: The Resolved Stellar Content of Local Group Galaxies Currently Forming Stars

Abstract: The galaxies of the Local Group serve as our laboratories for understanding star formation and stellar evolution in differing environments: the galaxies currently active in star-formation in the Local Group cover a factor of 10 in metallicity and span a range of Hubble types from dwarf spheroidal to Irr to Sb and Sc. We are proposing a uniform survey (\it UBVRI, H(alpha), [SII], and [OIII]) of nearby galaxies selected on the basis of current star formation. In the Local Group, this sample includes M31, M33, NGC 6822, IC 1613, IC 10, WLM, Pegasus, and Phoenix; we exclude the Milky Way and Magellanic Clouds, which are being surveyed separately by several groups. We also include Sextans A and Sextans B, located just beyond the Local Group (van den Bergh 1999a, 1999b). Using the new, wide-field Mosaic cameras, we will produce catalogs of \it UBVRI photometry of \it roughly 100 million stars, using H(alpha), [SII], and [OIII] to distinguish bona fide stellar members from compact H II regions. This on-line catalog will answer a number of scientific questions directly, but we believe that the real strength of this survey will be in the science we will \it enable with 8-10-m class telescopes and the capability of follow-up spectroscopy. In addition, the calibrated images will provide a detailed, uniform atlas of \it both the stellar and ionized gas components of these galaxies, which will certainly prove useful for a host of other projects.


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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