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Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage
Fahed, Rémi; Moffat, Anthony F J; Zorec, Juan et al.
2011In Neiner, Coralie; Wade, G.; Meynet, G. et al. (Eds.) Active OB stars: structure, evolution, mass loss and critical limits
 

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Keywords :
binaries: general; stars: fundamental parameters; stars: Wolf-Rayet; stars: winds; outflows
Abstract :
[en] 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Fahed, Rémi;  Université de Montréal, Montréal, Canada
Moffat, Anthony F J;  Université de Montréal, Montréal, Canada
Zorec, Juan;  Institut d'astrophysique de Paris, Paris, France
Eversberg, Thomas;  Schnörringen Telescope Science Institute, Köln, Germany
Chené, André*-Nicolas;  Herzberg Institute of Astrophysics, Victoria, Canada
Alves, Filipe
Arnold, Wolfgang
Bergmann, Thomas
Carreira, Luis F Gouveia
Dias, Filipe Marques
Fernando, Alberto
Gallego, José Sánchez
Hunger, Thomas
Knapen, Johan H
Leadbeater, Robin
Morel, Thierry  ;  Université de Liège - ULiège > Département d'Astrophysique, Géophysique & Océanographie (AGO) > Groupe d'Astrophysique des Hautes Energies (GAPHE)
Rauw, Grégor  ;  Université de Liège - ULiège > Département d'Astrophysique, Géophysique é Océanographie (AGO) > Groupe d'Astrophysique des Hautes Energies (GAPHE)
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
More authors (22 more) Less
Language :
English
Title :
Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage
Publication date :
01 July 2011
Audience :
International
Main work title :
Active OB stars: structure, evolution, mass loss and critical limits
Main work alternative title :
[en] Proceedings IAU Symposium no. 272
Editor :
Neiner, Coralie
Wade, G.
Meynet, G.
Peters, G.
Pages :
501-502
Available on ORBi :
since 16 August 2011

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