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Structure and Evolution of SV Centauri

Published online by Cambridge University Press:  12 April 2016

H. Drechsel ,
J. Rahe ,
W. Wargau  and
B. Wolf
H. Drechsel
Affiliation:
Remeis – Sternwarte Bamberg, Astronomical Institute, University Erlangen-Nürnberg / F.R.G.
J. Rahe
Affiliation:
Remeis – Sternwarte Bamberg, Astronomical Institute, University Erlangen-Nürnberg / F.R.G.
W. Wargau
Affiliation:
Remeis – Sternwarte Bamberg, Astronomical Institute, University Erlangen-Nürnberg / F.R.G.
B. Wolf
Affiliation:
Landessternwarte Heidelberg / F.R.G.

Abstract

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Optical photometric and spectroscopic observations of the eclipsing binary SV Cen were used to derive orbital elements and absolute dimensions of the peculiar early-type contact system. UV spectroscopic observations obtained with the IUE satellite yielded the detection of mass loss from the system forming an expanding circumbinary envelope. SV Cen exhibits a non-uniform rate of period decrease, with major variations on a time scale of a few years. The period changes are explained in terms of loss of angular momentum carried away by the ejected matter. Short-term fluctuations of the stellar wind on a time scale of a few hours were found from an analysis of the envelope line profiles of UV resonance lines. A model of the system is derived, and the evolutionary stage and interaction processes are discussed.

Type
Part III: Evolutionary Processes in Close Binary Systems
Information
International Astronomical Union Colloquium , Volume 69: Binary and Multiple Stars as Tracers of Stellar Evolution , 1982 , pp. 205 - 216
Copyright
Copyright © Reidel 1982

References

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