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Dust enshrouded AGB stars in the LMC

Published online by Cambridge University Press:  12 April 2016

Kenneth H. Hinkle ,
Richard R. Joyce  and
Tuan Do
Kenneth H. Hinkle
Affiliation:
National Optical Astronomy Observatory, 950 N. Cherry Avenue, Tucson, AZ 85719, USA
Richard R. Joyce
Affiliation:
National Optical Astronomy Observatory, 950 N. Cherry Avenue, Tucson, AZ 85719, USA
Tuan Do
Affiliation:
National Optical Astronomy Observatory, 950 N. Cherry Avenue, Tucson, AZ 85719, USA

Abstract

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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 µm 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 is as cool as the bright galactic enshrouded carbon star CW Leo, although the MSX survey does appear to detect objects similar to CW Leo. 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.

Type
Part 2. What variable stars tell us about the Local Group, including the distance scale
Information
International Astronomical Union Colloquium , Volume 193: Variable Stars in the Local Group , 2004 , pp. 107 - 110
Copyright
Copyright © Astronomical Society of the Pacific 2004

References

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