Bulletin de la Société Royale des Sciences de Liège Bulletin de la Société Royale des Sciences de Liège -  Volume 80 - Année 2011 

Spectroscopic follow-up of the colliding-wind binary WR140 during the 2009 January periastron passage

R. Fahed, 

Université de Montréal, Montréal, Canada

A. F. J. Moffat, 

Université de Montréal, Montréal, Canada

J. Zorec, 

Institut d’Astrophysique de Paris, Paris, France

T. Eversberg, 

Schnörringen Telescope Science Institute, Köln, Germany

A. N. Chené, 

Herzberg Institute of Astrophysics, Victoria, Canada

F. Alves, 

MONS pro-am collaboration

W. Arnold, 

MONS pro-am collaboration

T. Bergmann, 

MONS pro-am collaboration

L. F. Gouveia Carreira, 

MONS pro-am collaboration

F. Marques Dias, 

MONS pro-am collaboration

A. Fernando, 

MONS pro-am collaboration

J. Sanchez Gallego, 

MONS pro-am collaboration

T. Hunger, 

MONS pro-am collaboration

J. Knapen, 

MONS pro-am collaboration

R. Leadbeater, 

MONS pro-am collaboration

T. Morel, 

MONS pro-am collaboration

G. Rauw, 

MONS pro-am collaboration

N. Reinecke, 

MONS pro-am collaboration

J. Ribeiro, 

MONS pro-am collaboration

N. Romeo, 

MONS pro-am collaboration

E. M. dos Santos, 

MONS pro-am collaboration

L. Schanne, 

MONS pro-am collaboration

O. Stahl, 

MONS pro-am collaboration

Ba. Stober, 

MONS pro-am collaboration

Be. Stober, 

MONS pro-am collaboration

N. G. Correia Viegas, 

MONS pro-am collaboration

K. Vollmann, 

MONS pro-am collaboration

M. F. Corcoran
S. M. Dougherty
J. M. Pittard
A. M. T. Pollock
P. M. Williams

Abstract

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 (around 8 years) and eccentricity (around 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.

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R. Fahed, A. F. J. Moffat, J. Zorec, T. Eversberg, A. N. Chené, F. Alves, W. Arnold, T. Bergmann, L. F. Gouveia Carreira, F. Marques Dias, A. Fernando, J. Sanchez Gallego, T. Hunger, J. Knapen, R. Leadbeater, T. Morel, G. Rauw, N. Reinecke, J. Ribeiro, N. Romeo, E. M. dos Santos, L. Schanne, O. Stahl, Ba. Stober, Be. Stober, N. G. Correia Viegas, K. Vollmann, M. F. Corcoran, S. M. Dougherty, J. M. Pittard, A. M. T. Pollock & P. M. Williams, «Spectroscopic follow-up of the colliding-wind binary WR140 during the 2009 January periastron passage», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 80 - Année 2011, 668 - 672 URL : https://popups.uliege.be/0037-9565/index.php?id=3133.