The WR 140 periastron passage 2009: first results from MONS and other optical sources

Details The WR 140 periastron passage 2009: first results from MONS and other optical sources The WR 140 periastron passage 2009: first results from MONS and other optical sources

2011-01-07

arxiv.org/abs/1101.1430v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

5 pages, 5 figures, Published in proceedings of "Stellar Winds in Interaction", editors T. Eversberg and J.H. Knapen. Full pro

Scientific paper

We present the results from the spectroscopic follow-up of WR140 (WC7 + O4-5) during its last periastron passage in January 2009. This object is known as the archetype of colliding wind binaries and has a relatively large period (~ 8 years) and eccentricity (~ 0.89). We provide updated values for the orbital parameters, new estimates for the WR and O star masses and new constraints on the mass-loss rates.

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