Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-29T19:43:23.011Z Has data issue: false hasContentIssue false
  • English
  • Français

Hα and NaD Line Variability in RY Tauri

Published online by Cambridge University Press:  12 April 2016

P. Petrov  and
O. Vilhu
P. Petrov
Affiliation:
Crimean Astrophysical Observatory, 334413 Crimea, USSR
O. Vilhu
Affiliation:
Observatory and Astrophysics Laboratory, University of Helsinki, SF-00130 Helsinki, Finland

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Using high resolution spectroscopy of the T Tau star RY Tau in the regions of Hα and Na D lines, we discovered line profile variability, which is interpreted by a hypothesis of stellar ’prominences’: cool gas clouds are moving inside the stellar wind, ascending and descending on a time scale of a few days. These clouds are supposed to be controlled by the magnetic field of the star. The range of radial velocities of the clouds (−100 to +100 km/s) is twice as large as the rotational velocity (v sin i) of the star. The form of variability of the Hα profile suggests the existence of two components: the (variable) stellar wind and the circumstellar disc.

Type
Part IV Stellar activity
Information
International Astronomical Union Colloquium , Volume 130: The Sun and Cool Stars: activity, magnetism, dynamos , 1991 , pp. 471 - 476
Copyright
Copyright © Springer-Verlag 1991

References

Bertout, C.: 1988, in Dupree, A.K. and Lago, M.T.V.T. (eds.), Formation and Evolution of Low Mass Stars, NATO ASI Series, Kluwer Academic Publishers, Dordrecht, Holland Google Scholar
Cameron, A.C., Robinson, R.D.: 1989, Monthly Notices Roy. Astron. Soc. 236, 57 CrossRefGoogle Scholar
Joy, A.H.: 1945, Astrophys. J. 102, 168 Google Scholar
Herbig, G.H., Bell, K.R.: 1988, Lick Observatory Bull. No. 1111.Google Scholar
Petrov, P.P.: 1990, Astrophysics and Space Sci. 169, 61 Google Scholar
Zaitseva, G.V., Kolotilov, E.A., Petrov, P.P., Tarasov, E.A., Shenavrin, V.I., Shcherbakov, A.G.: 1985, Soviet Astron. Letters 11, 271 Google Scholar