Other
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19711302m&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #113.02; Bulletin of the American Astronomical Society, Vol. 32, p.1595
Other
1
Scientific paper
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, Hα, [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 Hα, [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.
Hodge Paul W.
Jacoby George H.
King N. L.
Massey Pedro
Olson A. G. K.
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