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astro-ph2007★ 49 cited
The Struve-Sahade effect in the optical spectra of O-type binaries I. Main-sequence systems
N. Linder, G. Rauw, H. Sana +2
We present a spectroscopic analysis of four massive binary systems that are known or are good candidates to display the Struve-Sahade effect (defined as the apparent strengthening…
astro-ph2007★ 121 cited
The massive star binary fraction in young open clusters I. NGC 6231 revisited
H. Sana, E. Gosset, Y. Naze +2
We present the results of a long-term high-resolution spectroscopy campaign on the O-type stars in NGC 6231. We revise the spectral classification and multiplicity of these objects…