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T. Do, K. H. Hinkle, R. Joyce (NOAO)
A near-infrared (J and K) survey of the LMC bar west region was undertaken with CIRIM on the CTIO 1.5 m telescope to search for obscured carbon stars. A number of very red stars were detected, and from this list five highly reddened, `obscured' stars were identified. Subsequent to our survey we identified these sources in the 2MASS survey data. Using our J, K photometry as well as J, H, K from 2MASS, 8.28 \mum from the MSX satellite, and L photometry from Phoenix on Gemini, we have measured the color temperature and flux of the detected obscured stars. None of these objects are as cool as IRC+10216, although the MSX survey does appear to detect objects similar to IRC+10216. Using the Phoenix high resolution infrared spectrograph on Gemini we have observed the first overtone CO spectra of four of the LMC obscured stars. All the spectra are those expected for obscured carbon stars, but a surprising variety of line profiles was found.
Do's research was supported by the NOAO/KPNO Research Experiences for Undergraduates (REU) Program which is funded by the National Science Foundation through Scientific Program Order No. 3 (AST-0243875) of the Cooperative Agreement No. AST-0132798 between the Association of Universities for Research in Astronomy (AURA) and the NSF.
The author(s) of this abstract have provided an email address for comments about the abstract: tdo@ugastro.berkeley.edu
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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.