Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage
Abstract
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.
- Publication:
-
Active OB Stars: Structure, Evolution, Mass Loss, and Critical Limits
- Pub Date:
- July 2011
- DOI:
- Bibcode:
- 2011IAUS..272..501F
- Keywords:
-
- binaries: general;
- stars: fundamental parameters;
- stars: Wolf-Rayet;
- stars: winds;
- outflows