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The Wolf-Rayet Eclipsing Binary HD 5980 in the Small Magellanic Cloud

Published online by Cambridge University Press:  14 August 2015

Jacques Breysacher ,
Anthony F. J. Moffat  and
Virpi S. Niemelä
Jacques Breysacher
Affiliation:
European Southern Observatory, Garching bei München
Anthony F. J. Moffat
Affiliation:
Département de Physique, Université de Montréal
Virpi S. Niemelä
Affiliation:
Instituto de Astronomia y Fisica del Espacio, and Instituto de Radioastronomia, Buenos Aires

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The Wolf-Rayet star HD 5980, which is probably associated with the bright HII region NGC 346 of the Small Magellanic Cloud, was found to be an eclipsing binary by Hoffmann, Stift and Moffat (1978). Breysacher and Perrier (1980) determined the orbital period, P=19.266±0.003d, of the system whose light curve reveals a strongly eccentric orbit (e=0.47 for i=80°). The behaviour of the light curve outside the eclipses shows that we are dealing with a rather complex binary system. An analysis of the spectroscopic data is presented here.

Type
SESSION 4 — OBSERVATIONS OF WOLF-RAYET BINARIES
Information
Symposium - International Astronomical Union , Volume 99: Wolf-Rayet Stars: Observations, Physics, Evolution , 1982 , pp. 317 - 320
Copyright
Copyright © Reidel 1982 

References

Azzopardi, M., Breysacher, J.:1979, Astron. Astrophys. 75, 120.Google Scholar
Baranne, A., Duchesne, M.:1976, Advances in Electronics and Electron Physics, Vol. 40B, 641.Google Scholar
Breysacher, J., Perrier, C.:1980, Astron. Astrophys. 90, 207.Google Scholar
Hoffmann, M., Stift, M.J., Moffat, A.F.J.:1978, Publ. Astron. Soc. Pacific 90, 101.Google Scholar
Moffat, A.F.J., Seggewiss, W.:1980, IAU Symp. No. 88, Close Binary Stars: Observations and Interpretation, eds. Plavec, M.J., Popper, D.M., Ulrich, R.K., Reidel, Dordrecht, p. 181.Google Scholar