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ASP Conference Series

Line profile variability in the massive binary system HD 149404+

Y. Nazé1,*, F. Carrier2 and G. Rauw1,**

1 Institut d'Astrophysique et de Géophysique - Université de Liège, Avenue de Cointe 5, 4000 Liège, Belgium
2 Observatoire de Genève, CH 1290 Sauverny, Switzerland

* Research Fellow FNRS, Belgium
** Postdoctoral Researcher FNRS, Belgium and Visiting Astronomer, CTIO

+ Based on observations collected at the European Southern Observatory (La Silla, Chile) and the Cerro Tololo Inter-American Observatory (CTIO).


     Over the last years, the research on colliding winds in massive binaries has made significant progress. For instance, it has been shown that the observation of phase-locked variability of prominent optical emission lines can be used as a diagnostic to study the properties of the wind interaction in these systems.

     We report here our analysis of the binary system HD 149404. Using a large set of spectroscopic observations, we determine new spectral types and a new orbital solution. We also analyse the line profile variability of several emission lines and we briefly discuss a possible model for this system.

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