Spectroscopic Follow-Up Of The Colliding-Wind Binary Wr 140 During The 2009 January Periastron Passage

Remi Fahed,Anthony F. J. Moffat, Juan Zorec,Thomas Eversberg,Andre-Nicolas Chene, Filipe Alves,Wolfgang Arnold,Thomas Bergmann,Luis F. Gouveia Carreira, Filipe Marques Dias,Alberto Fernando,Jose Sanchez Gallego,Thomas Hunger,Johan H. Knapen, Robin Leadbeater,Thierry Morel,Gregor Rauw,Norbert Reinecke, Jose Ribeiro,Nando Romeo, Eva M. Dos Santos, Lothar Schanne,Otmar Stahl,Barbara Stober, Berthold Stober,Nelson G. Correia Viegas,Klaus Vollmann,Michael F. Corcoran,Sean M. Dougherty,Julian M. Pittard,Andy M. T. Pollock,Peredur M. Williams

Proceedings of The International Astronomical Union（2011）

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摘要

We present the results from the spectroscopic follow-up of WR140 (WC7 + 04-5) 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 (similar or equal to 8 years) and eccentricity (similar or equal to 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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关键词

binaries: general, stars: fundamental parameters, stars: Wolf-Rayet, stars: winds, outflows

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