AAS 197, January 2001
Session 78. Nearby Galaxies I
Display, Wednesday, January 10, 2001, 9:30am-7:00pm, Exhibit Hall

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[78.03] Classifying IR sources in the SMC: 2MASS/MSX color-based identifications.

M.P. Egan (AFRL/VS), S.D. van Dyk (IPAC)

The Small Magellanic Cloud (SMC) was observed in the mid-infrared by the Midcourse Space Experiment (MSX) and in the near-IR by the Two Micron All Sky Survey (2MASS). We have performed a cross-correlation of the MSX SMC point source catalog and the 2MASS point source catalog and find 236 matches. The colors of the sources correspond very well with sources seen by MSX/2MASS in the Large Magellanic Cloud (Egan et al. 2000 submitted). Using the identification scheme developed for the LMC, we identify a number of stellar populations and red nebulae, including main sequence stars, giant stars, red supergiants, carbon- and oxygen-rich asymptotic giant branch (AGB) stars, planetary nebulae, H II regions, and other dusty objects likely associated with early-type stars. The spatial distribution of the infrared SMC sources may contribute to understanding stellar formation and evolution in the SMC and its overall galactic evolution. Our combined mid- and near-infrared photometric baseline provides a powerful means of locating new objects in the SMC for future ground-based and space-based follow-up observations.

The author(s) of this abstract have provided an email address for comments about the abstract: Michael.Egan2@hanscom.af.mil

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