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Activity in the circumstellar envelope of the Be/shell star ζ Tau

Published online by Cambridge University Press:  26 May 2016

Yulian Guo ,
Lin Huang  and
Jinxin Hao
Yulian Guo
Affiliation:
Beijing Astronomical Observatory, Chinese Academy of Sciences
Lin Huang
Affiliation:
Beijing Astronomical Observatory, Chinese Academy of Sciences
Jinxin Hao
Affiliation:
Beijing Astronomical Observatory, Chinese Academy of Sciences

Extract

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ζ Tau is a well-known V/R-variable shell star. It is a single-lined spectroscopic binary with an orbital period of 133 days (Harmanec 1984, and Jarad 1987). Delplace (1970) found that the long-term radial velocity variations of the Balmer shell absorption lines are cyclic in 1960–67. Subsequently, similar behaviour has been observed and studied by several authors (Delplace and Chambon 1976, Hubert-Delplace et al 1983, Harmanec 1984, and Guo and Cao 1987). Mon et al (1992) showed that the cyclic variation had terminated and the star seems to have entered a new quiet phase around 1982.

Type
6. Be Stars: Circumstellar Environment
Information
Symposium - International Astronomical Union , Volume 162: Pulsation, Rotation and Mass Loss in Early-Type Stars , 1994 , pp. 372 - 373
Copyright
Copyright © Kluwer 1994 

References

1. Delplace, A. M. 1970, A. Ap. 7, 68 Google Scholar
2. Delplace, A. M. and Chambon, M. Th., 1976, in IAU symp. No.70, Be and shell stars ed, Slettebak, A. (Dordrecht:Reide), P.79 Google Scholar
3. Yulian, Guo and Weishi, Gao, 1987, Be Newsletter 16, 9 Google Scholar
4. Harmanec, P., 1984, Bull. Astron. Inst. Czech. 35, 164 Google Scholar
5. Hubert-Delplace, A. M., Jaschek, M., Hubert, H. and Chanbon, M. Th., 1982, in IAU symp. 98, eds. Jaschek, M. and Groth, M. G., P.125 Google Scholar
6. Hubert-Delplace, A. M., Mon, M., Ungerer, V., Hirata, R., Paterson- Beeckmans, F., Hubert, H., and Baade, D., 1983, A. Ap. 121, 174 Google Scholar
7. Jarad, M. M., 1987, Ap. S. S. 139,83 CrossRefGoogle Scholar
8. Mon, M., Kogure, T., Suzuki, M., and Singh, M., 1992, Publ. Astron. Soc. Japan, 44, 73 Google Scholar