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Astrophysics and Space Science

, Volume 99, Issue 1–2, pp 139–144 | Cite as

Radial velocity and profile variations of the ultraviolet circumstellar lines in ζ tauri

  • D. N. Dawanas
  • R. Hirata
Article

Abstract

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 (exceptCii, Aliii, Siiii resonance lines) follow the same velocity variations as in the visual spectra, while the Siiv andCiv resonance lines show a constant negative velocity (∼−50 km s−1 at the core). The Aliii,Cii resonance lines and probably Feiii (mult. No. 34) are formed in both regions, i.e., in lowly-ionized and highly-ionized regions and the Siiii resonance line is formed in a highly-ionized region.

Keywords

Radial Velocity Velocity Variation Resonance Line Neutral Atom Feiii 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© D. Reidel Publishing Company 1984

Authors and Affiliations

  • D. N. Dawanas
    • 1
    • 2
  • R. Hirata
    • 3
  1. 1.Bosscha Observatory, Department of AstronomyBandung Institute of TechnologyIndonesia
  2. 2.Department of AstronomyUniversity of KyotoJapan
  3. 3.Department of AstronomyUniversity of KyotoJapan

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