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)
