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.

Pour citer cet article

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 : http://popups.ulg.be/0037-9565/index.php?id=3133.