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Line-profile variability of EZ CMa

Published online by Cambridge University Press:  07 August 2017

L. Georgiev  and
M. M. Ivanov
L. Georgiev
Affiliation:
Department of Astronomy, University of Sofia, 5 James Bourchier st., BG - 1126 Sofia, Bulgaria
M. M. Ivanov
Affiliation:
Department of Astronomy, University of Sofia, 5 James Bourchier st., BG - 1126 Sofia, Bulgaria

Abstract

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CCD spectra for the unusual Wolf-Rayet star EZ CMa (WR6) are presented. The analysis of the profile changes of HeII lines shows a correlation between the gravity center of the line and the skewness (Robert et al. 1992). The fourth moment (kurtosis) changes with phase and looks epoch independent. These observable effects could be treated as manifestations of wind variability rather than consequence of orbital motion.

Keywords

stars: Wolf-Rayetstars individual: WR6
Type
Session I - Basic parameters, properties of single Wolf-Ray et stars
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 54 - 55
Copyright
Copyright © Kluwer 1995 

References

Firmani, C., Koenigsberger, G., Bisiacchi, G.F., Moffat, A.F.J., Isserstedt, J. 1980, ApJ 239, 607 CrossRefGoogle Scholar
Gosset, E., Vreux, J.-M. 1987, A&A 178, 153 Google Scholar
Matthews, J.M., St-Louis, N., Moffat, A.F.J., Drissen, L., Koenigsberger, G., Cardona, O., Niemela, V.S. 1992, in: Drissen, L., Leitherer, C. & Nota, A. (eds.), Non-isotropic and Variable Outflows from Stars, ASP Conf. Series 22, p. 130.Google Scholar
Pollock, A.M.T. 1989, ApJ 347, 409 Google Scholar
Robert, C., Moffat, A.F.J., Drissen, L., Lamontagne, R., Seggewiss, W., Niemela, V.S., Cerruti, M.A., Barrett, P., Bailey, J., Garcia, J., Tapia, S. 1992, ApJ 397, 277 Google Scholar
Schulte-Ladbeck, R.E., Nordsieck, K.H., Nook, M.A., Magalhães, A.M., Taylor, M., Bjorkman, K.S., Anderson, C.M. 1990, ApJ (Letters) 365, L19.Google Scholar
Underhill, A.B., Yang, S. 1991, ApJ 368, 588 Google Scholar