Spectroscopic follow-up of the colliding-wind binary WR140 during the 2009 January periastron passage

Details Spectroscopic follow-up of the colliding-wind binary WR140 during the 2009 January periastron passage Spectroscopic follow-up of the colliding-wind binary WR140 during the 2009 January periastron passage

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011bsrsl..80..668f&link_type=abstract

Société Royale des Sciences de Liège, Bulletin, vol. 80, p. 668-672 (Proceedings of the 39th Liège Astrophysical Colloquium, hel

Astronomy and Astrophysics

Astrophysics

6

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 (≃0.9). 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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