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Mass Loss from Carbon Stars: Circumstellar C2 Swan Band

Published online by Cambridge University Press:  26 May 2016

Rie Kimata  and
Hideyuki Izumiura
Rie Kimata
Affiliation:
Department of Astronomy, Faculty of Science, Kyoto University, Kita-Shirakawa Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
Hideyuki Izumiura
Affiliation:
Okayama Astrophysical Observatory, NAOJ, Honjo 3037-5, Kamogata, Asakuchi, Okayama 719-0232, Japan

Abstract

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We have searched 44 optical carbon stars for circumstellar C2 Swan (0,0) band absorption lines using the high dispersion echelle spectrograph for the 188 cm reflector at Okayama Astrophysical Observatory. We have detected the circumsteller C2 lines definitely in 18 stars, possibly in 6 stars, and not detected in 20 stars. We discuss the observed properties of the circumstellar C2 lines. We infer the C2 line-forming region is located at the innermost part of the circumstellar envelope.

Type
Part III: Planetary Nebulae in the Scheme of Stellar Evolution
Information
Symposium - International Astronomical Union , Volume 209: Planetary Nebulae: Their Evolution and Role in the Universe , 2003 , pp. 69 - 70
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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