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Radial Velocity and Profile Variations of the Ultraviolet Circumstellar Lines in ζ Tauri*

Published online by Cambridge University Press:  12 April 2016

D. N. Dawanas
Affiliation:
Bosscha Observatory, Department of Astronomy, Bandung Institute of Technology, Indonesia and Department of Astronomy, University of Kyoto, Japan
R. Hirata
Affiliation:
Department of Astronomy, University of Kyoto, Japan

Abstract

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The radial velocity and profile variations of UV lines of the shell star ζ Tau have been examined in the IUE spectra obtained in 1978-1982. The neutral atoms, and once or twice-ionized ions (except C II, Al III, Si III resonance lines) follow the same velocity variations as in the visual spectra, while the Si IV and C IV resonance lines show a constant negative velocity (~ -50 km s at the core). The Al III, C II resonance lines and probably Fe III (mult. No. 34) are formed in both regions, i.e., in lowly-ionized and highly-ionized regions and the Si III resonance line is formed in a highly-ionized region.

Type
Research Article
Copyright
Copyright © Reidel 1984

Footnotes

**

Guest observer with the International Ultraviolet Explorer Satellite.

*

Paper presented at the Lembang-Bamberg IAU Colloquium No. 80 on ‘Double Stars: Physical Properties and Generic Relations', held at Bandung, Indonesia, 3-7 June, 1983.

References

Delplace, A. M. and Chambon, M. Th.: 1976, in Slettebak, A. (ed.), ‘Be and Shell Stars', I AU Symp. 70, 79.Google Scholar
Hirata, R., Katahira, J., and Jugaku, J.: 1982, in Jaschek, M. and Groth, H. G. (eds.), ‘Be Stars', IAU Symp. 98, 161.Google Scholar
Hubert-Delplace, A. M., Mon, M., Ungerer, V., Hirata, R., Paterson-Beeckmans, F., Hubert, H., and Baade, D.: 1982, Astron. Astrophys. 121, 174.Google Scholar
Hynek, J. A. and Struve, O.: 1942, Astrophys. J. 96, 425.CrossRefGoogle Scholar
Kelly, R. L.: 1979, NASA TM 80268, Goddard Space Flight Center, Greenbelt, Maryland.Google Scholar
Kelly, R. L. and Palumbo, L. J.: 1973, NRL Report 7599, Washington, Naval Research Laboratory.Google Scholar
Underhill, A.B.: 1952, Pubi. Dominion Astrophys. Obs. 9, 138.Google Scholar