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Long-term spectroscopy of Wolf-Rayet binaries

Published online by Cambridge University Press:  25 May 2016

Jörg Schweickhardt ,
Werner Schmutz ,
Andreas Kaufer ,
Otto Stahl  and
Bernhard Wolf
Jörg Schweickhardt
Affiliation:
Landessternwarte Königstuhl, D-69117 Heidelberg, Germany
Werner Schmutz
Affiliation:
Institut für Astronomie, ETH-Zentrum, CH-8092 Zurich, Switzerland
Andreas Kaufer
Affiliation:
Landessternwarte Königstuhl, D-69117 Heidelberg, Germany
Otto Stahl
Affiliation:
Landessternwarte Königstuhl, D-69117 Heidelberg, Germany
Bernhard Wolf
Affiliation:
Landessternwarte Königstuhl, D-69117 Heidelberg, Germany

Abstract

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We are investigating two long-period WR+O binaries, γ2 Velorum (WC8+O7.5, P = 78.5d) and WR 22 (WN7+abs+O, P = 80.3 d). We derive new orbital elements for both binaries and we give preliminary results of our analysis of the expansion velocity and ionization structure of γ2 Vel.

Type
Part 1. Basic observational properties of Wolf-Rayet stars and other hot massive stars
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 98 - 100
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Auer, L., Koenigsberger, G. 1994, ApJ 436, 859 Google Scholar
Schmutz, W., Schweickhardt, J., Stahl, O. et al. 1997, A&A 328, 219 Google Scholar
Schweickhardt, J., Schmutz, W., Stahl, O. et al. 1999, in preparation Google Scholar