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

Bibcode
2011IAUS..272..501F
DOI
10.1017/S1743921311011173
Fahed, Rémi; Moffat, Anthony F. J.; Zorec, Juan; Eversberg, Thomas; Chené, André-Nicolas; Alves, Filipe; Arnold, Wolfgang; Bergmann, Thomas; Carreira, Luis F. Gouveia; Dias, Filipe Marques; Fernando, Alberto; Sánchez-Gallego, J.; Hunger, Thomas; Knapen, J. H.; Leadbeater, Robin; Morel, Thierry; Rauw, Grégor; Reinecke, Norbert; Ribeiro, José; Romeo, Nando; dos Santos, Eva M.; Schanne, Lothar; Stahl, Otmar; Stober, Barbara; Stober, Berthold; Viegas, Nelson G. Correia; Vollmann, Klaus; Corcoran, Michael F.; Dougherty, Sean M.; Pittard, Julian M.; Pollock, Andy M. T.; Williams, Peredur M.
Bibliographical reference

Active OB stars: structure, evolution, mass loss, and critical limits, Proceedings of the International Astronomical Union, IAU Symposium, Volume 272, p. 501-502

Advertised on:
7
2011
Number of authors
32
IAC number of authors
2
Citations
0
Refereed citations
0
Description
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.
Type
Non-refereed

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