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astro-ph2004★ 110 cited
WR20a: a massive cornerstone binary system comprising two extreme early-type stars
G. Rauw, M. De Becker, Y. Naze +6
We analyse spectroscopic observations of WR20a revealing that this star is a massive early-type binary system with a most probable orbital period of \sim 3.675 days. Our spectra in…
astro-ph2004★ 58 cited
A phase-resolved XMM-Newton Campaign on the Colliding Wind Binary HD 152248
H. Sana, I. R. Stevens, E. Gosset +2
We report the first results of an XMM-Newton monitoring campaign of the NGC 6231 open cluster in the Sco OB1 association. This first paper focuses on the massive colliding wind bin…