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ASP Conference Series

New colliding wind massive binaries

M. De Becker1 and G. Rauw1,*

1 Institut d'Astrophysique et de Géophysique - Université de Liège, Allée du 6 Août, Bât B5c, B-4000 Liège (Sart Tilman), Belgium

* Research Associate FNRS, Belgium


     We report on the recent discovery of two new massive binary systems: WR 20a and Cyg OB2 #8A. For both systems, we briefly present the orbital solutions and we discuss the strong phase-locked line profile variability of the H and HeII 4686 lines for WR 20a, and the HeII 4686 line in the case of Cyg OB2 #8A. In both cases, we show that the profile variability reveals a signature of a wind interaction. The prospects for future high-energy observations are also discussed.

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