[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 (≃0.9). 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, R.; Université de Montréal, Montréal, Canada
Moffat, A. F. J.
Zorec, J.
Eversberg, T.
Chené, A. N.
Alves, F.
Arnold, W.
Bergmann, T.
Gouveia Carreira, L. F.
Marques Dias, F.
Fernando, A.
Sanchez Gallego, J.
Hunger, T.
Knapen, J.
Leadbeater, R.
Morel, Thierry ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)
Rauw, Grégor ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Sciences spatiales
