The massive star binary fraction in young open clusters - III. IC 2944 and the Cen OB2 association

@inproceedings{Sana2011TheMS,
  title={The massive star binary fraction in young open clusters - III. IC 2944 and the Cen OB2 association},
  author={Hugues Sana and Gael James and Eric Gosset},
  year={2011}
}
Using an extended set of multi-epoch high-resolution high signal-to-noise ratio optical spectra, we readdress the multiplicity properties of the O-type stars in IC 2944 and in the Cen OB2 association. We present new evidence of binarity for five objects and we confirm the multiple nature of another two. We derive the first orbital solutions for HD 100099, HD 101436 and HD 101190 and we provide additional support for HD 101205 being a quadruple system. The minimal spectroscopic binary fraction… CONTINUE READING
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