AAS 197, January 2001
Session 113. Stars and Clusters in the Galaxy and Local Group
Display, Thursday, January 11, 2001, 9:30-4:00pm, Exhibit Hall

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[113.02] The Resolved Stellar Content of Local Group Galaxies Currently Forming Stars

P. Massey (Lowell Obs.), P. W. Hodge (U. Wash.), G. H. Jacoby (WIYN), N. L. King (STScI), K. A. G. Olson (CTIO/NOAO), A. Saha (KPNO/NOAO), C. Smith (CTIO/NOAO)

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 conducting a uniform survey (UBVRI, Halpha, [SII], and [OIII]) of nearby galaxies selected on the basis of current star formation. In the Local Group, this sample includes M31, M33, NGC6822, IC1613, IC10, 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 (see van den Bergh 2000, The Galaxies of the Local Group). Using the new, wide-field Mosaic cameras on the KPNO and CTIO 4-m telescopes, we will produce catalogs of UBVRI photometry of roughly 100 million stars, using Halpha, [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 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 both the stellar and ionized gas components of these galaxies, which will certainly prove useful for a host of other projects. Here we present some of our first images and give a progress report.

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