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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  and
R. Hirata
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
Information
International Astronomical Union Colloquium , Volume 80: Double Stars, Physical Properties and Generic Relations , 1984 , pp. 139 - 144
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.

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