SEST CO (J=1-0) observations of carbon-rich circumstellar envelopes.
Abstract
The authors have used the Swedish ESO Submillimetre Telescope (SEST) to search for circumstellar CO (J = 1-0) emission towards bright carbon stars in the southern hemisphere. A correlation between the estimated mass loss rate and a far-IR excess measure is discussed. The CO (1-0) line profiles indicate a diversity in the characteristics of the circumstellar envelopes. In particular, two stars with distinctly double-peaked line shapes have been detected. One of them, S Sct, is interpreted in terms of an extended, cold, detached shell, with no hot gas/dust close to the star.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 1988
- Bibcode:
- 1988A&A...196L...1O
- Keywords:
-
- Carbon Monoxide;
- Carbon Stars;
- Emission Spectra;
- Infrared Telescopes;
- Stellar Envelopes;
- Far Infrared Radiation;
- Line Shape;
- Stellar Spectra;
- Astronomy