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Space Science Reviews

, Volume 66, Issue 1–4, pp 231–236 | Cite as

The complex Hα profile of the hypergiant HR 8752 during 1970–1992

  • J. Smolinski
  • J. L. Climenhaga
  • Y. Huang
  • Sh. Jiang
  • M. Schmidt
  • O. Stahl
Massive Star Atmospheres and Stellar Winds

Abstract

The profiles of Hα observed during the 1970–1992 period in the binary hypergiant HR 8752 (G0 Ia) are presented. We distinguish five typical Hα profiles designated as A, B, C, D and E types according to the number of emission and absorption features. The profiles of Hα are complex and contain several emission and absorption components, with: −130 km/s in emission or absorption, −84 km/s in absorption, −49 km/s in emission and about +6 km/s in emission. All of them are rather stable in radial velocities except of the main absorption component in the P Cygni profile with −84 km/s. The frequency of appearance and the periods of duration of the occurrence of the components is discussed. The duration times range between about 3 to 10 months for various components. The red emission component E2 is particularly interesting. Possible explanations of its origin are discussed.

A long-term acceleration of the absorption component in the P Cygni profile is found; it can be interpreted as monotonous acceleration of the stellar wind.

Keywords

Radial Velocity Duration Time Absorption Feature Absorption Component Stellar Wind 
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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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • J. Smolinski
    • 1
  • J. L. Climenhaga
    • 2
  • Y. Huang
    • 3
  • Sh. Jiang
    • 3
  • M. Schmidt
    • 1
  • O. Stahl
    • 4
  1. 1.N.Copernicus Astronomical CenterTorun ul. Chopina 12/18Poland
  2. 2.Department of Physics and AstronomyUniversity of VictoriaVictoriaCanada
  3. 3.Beijing Astrophysical ObservatoryBeijingChina
  4. 4.LandessternwarteHeidelbergGermany

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