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The changing spectrum and orbital motion of the SMC Wolf-Rayet binary HD 5980

Published online by Cambridge University Press:  07 August 2017

R.H. Barbá  and
V.S. Niemela
R.H. Barbá
Affiliation:
1 Observatorio Astronómico, Universidad National de La Plata, Argentina
V.S. Niemela
Affiliation:
2 Institute de Astronomía y Física del Espacio, Buenos Aires, Argentina

Abstract

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Optical spectroscopic observations of the eclipsing binary WR star HD 5980 in the SMC, obtained during different epochs, show a remarkable change of the WR type spectrum from spectral type WN3-4 to WN7-8. Radial velocities of the WR emission lines from spectra obtained in August 1992, indicate an orbital motion corresponding to the secondary component which is in front of the system during the primary eclipse. We compare the RV curves and phase-dependent line-width variations observed in 1992 with previously published data.

Keywords

stars: Wolf-Rayetbinariesvariablesindividual: HD 5980
Type
Session IV - poster summaries
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 254 - 255
Copyright
Copyright © Kluwer 1995 

References

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