To be published in:
ASP Conference Series
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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