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Long-term spectroscopic and polarimetric variations of the Be star κ Dra

Published online by Cambridge University Press:  26 May 2016

J. Arsenijevic ,
S. Jankov ,
S. Krsljanin ,
A.M. Hubert ,
H. Hubert ,
M.T. Chambon ,
J. Chauville ,
M. Floquet  and
A. Mekkas
J. Arsenijevic
Affiliation:
Astronomical Observatory, Belgrade, Yugoslavia
S. Jankov
Affiliation:
Astronomical Observatory, Belgrade, Yugoslavia
S. Krsljanin
Affiliation:
Astronomical Observatory, Belgrade, Yugoslavia
A.M. Hubert
Affiliation:
Observatoire de Paris, section d'Astrophysique de Meudon, URA 335 du CNRS, F-92195 Meudon Cedex, France
H. Hubert
Affiliation:
Observatoire de Paris, section d'Astrophysique de Meudon, URA 335 du CNRS, F-92195 Meudon Cedex, France
M.T. Chambon
Affiliation:
Observatoire de Paris, section d'Astrophysique de Meudon, URA 335 du CNRS, F-92195 Meudon Cedex, France
J. Chauville
Affiliation:
Observatoire de Paris, section d'Astrophysique de Meudon, URA 335 du CNRS, F-92195 Meudon Cedex, France
M. Floquet
Affiliation:
Observatoire de Paris, section d'Astrophysique de Meudon, URA 335 du CNRS, F-92195 Meudon Cedex, France
A. Mekkas
Affiliation:
Observatoire de Paris, section d'Astrophysique de Meudon, URA 335 du CNRS, F-92195 Meudon Cedex, France

Extract

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The bright Be star κ Dra (HD 109387, B5 III, v.sini=249 km/s) is one of the rare mid B type stars which have presented FeII emission lines during strong emission phases. Spectroscopic variations were previously reported by many authors over different time scales: years, days and hours. Juza et al. (1991) proposed that κ Dra was the primary component of a binary system with Porb. = 61.55 days. Short-term and long-term variations in the linear optical polarization were also reported by Arsenijevic et al. (1986). We have tried, with our extensive joint material, to search for correlation between long-term spectroscopic and polarimetric variations with the aim of obtaining information on the behaviour of the circumstellar envelope.

Type
4. Polarization
Information
Symposium - International Astronomical Union , Volume 162: Pulsation, Rotation and Mass Loss in Early-Type Stars , 1994 , pp. 234 - 235
Copyright
Copyright © Kluwer 1994 

References

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