Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage

Details Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..272..501f&link_type=abstract

Active OB stars: structure, evolution, mass loss, and critical limits, Proceedings of the International Astronomical Union, IAU

Astronomy and Astrophysics

Astronomy

Binaries: General, Stars: Fundamental Parameters, Stars: Wolf-Rayet, Stars: Winds, Outflows

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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