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The Expanding Atmosphere of HD 218393

Published online by Cambridge University Press:  14 August 2015

F. Paterson-Beeckmans ,
A.M. Hubert-Delplace ,
H. Hubert  and
D. Ballereau
F. Paterson-Beeckmans
Affiliation:
ESA Space Science Dept.,Astronomy Div., Noordwijk, Netherlands
A.M. Hubert-Delplace
Affiliation:
DEPEG, Observatoire de Paris, Meudon, France
H. Hubert
Affiliation:
DEPEG, Observatoire de Paris, Meudon, France
D. Ballereau
Affiliation:
DEPEG, Observatoire de Paris, Meudon, France

Abstract

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Visible and far ultraviolet high resolution spectra of the B2 binary star HD 218393 have been obtained at one day interval, shortly before the phase of maximum outwards velocity, adopting the period of 38.908 days. Both spectra show the existence of an extended atmosphere, accelerated outwards. The SiIV resonance lines show some indication of mass loss. With only one set of observations, the origin of the strong and wide (about 130 km/s FWHM) ultraviolet absorption lines of once ionized elements is difficult to determine.

Type
VII. UV Observations and Mass Loss
Information
Symposium - International Astronomical Union , Volume 98: Be Stars , 1982 , pp. 393 - 397
Copyright
Copyright © Reidel 1982 

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