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A spectroscopic search for colliding winds in a complete sample of WC/WO stars in the Magellanic Clouds

Published online by Cambridge University Press:  07 August 2017

P. Bartzakos ,
A.F.J. Moffat  and
V. S. Niemela
P. Bartzakos
Affiliation:
Département de Physique, Université de Montréal, C.P. 6128, Succursale A, Montréal, P.Q. ESC 3J7, Canada, and Observatoire du Mont-Mégantic
A.F.J. Moffat
Affiliation:
Département de Physique, Université de Montréal, C.P. 6128, Succursale A, Montréal, P.Q. ESC 3J7, Canada, and Observatoire du Mont-Mégantic
V. S. Niemela
Affiliation:
Institute de Astronomia y Fisica del Espacio, Buenos Aires, Argentina

Abstract

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The Magellanic Clouds provide an ideal laboratory to study the properties of Wolf-Rayet stars. In particular, the 25 WC/WO stars that they contain are nearly all of the same sub-class (21 WC4, one WC5, one WC6 and one WO in the Large Magellanic Cloud; one WO in the Small Magellanic Cloud). This, along with their formation in the same isolated environment, suggests that the wind structure is similar in each star. Thus, a study of other characteristics, such as the effects of binary separation and period on binary wind collisions, can be undertaken with little concern for differing winds. Some 30 high-quality CCD spectra for each of the 25 stars were obtained during three observing missions in the past decade. Although the analysis is not yet complete, the sample clearly contains four large-amplitude WR+O binaries with periods ranging from two to seventeen days and possibly other long-period systems. This paper deals with the wind interaction of the star B22.

Keywords

stars: Wolf-RayetbinarieswindsMagellanic Clouds
Type
Session VII - Hydrodynamics and high-energy physics of colliding winds
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 406 - 410
Copyright
Copyright © Kluwer 1995 

References

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