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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

(Volume 80 - Année 2011)
Article
Open Access

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

A propos de : R. Fahed

Université de Montréal, Montréal, Canada

A propos de : A. F. J. Moffat

Université de Montréal, Montréal, Canada

A propos de : J. Zorec

Institut d’Astrophysique de Paris, Paris, France

A propos de : T. Eversberg

Schnörringen Telescope Science Institute, Köln, Germany

A propos de : A. N. Chené

Herzberg Institute of Astrophysics, Victoria, Canada

A propos de : F. Alves

MONS pro-am collaboration

A propos de : W. Arnold

MONS pro-am collaboration

A propos de : T. Bergmann

MONS pro-am collaboration

A propos de : L. F. Gouveia Carreira

MONS pro-am collaboration

A propos de : F. Marques Dias

MONS pro-am collaboration

A propos de : A. Fernando

MONS pro-am collaboration

A propos de : J. Sanchez Gallego

MONS pro-am collaboration

A propos de : T. Hunger

MONS pro-am collaboration

A propos de : J. Knapen

MONS pro-am collaboration

A propos de : R. Leadbeater

MONS pro-am collaboration

A propos de : T. Morel

MONS pro-am collaboration

A propos de : G. Rauw

MONS pro-am collaboration

A propos de : N. Reinecke

MONS pro-am collaboration

A propos de : J. Ribeiro

MONS pro-am collaboration

A propos de : N. Romeo

MONS pro-am collaboration

A propos de : E. M. dos Santos

MONS pro-am collaboration

A propos de : L. Schanne

MONS pro-am collaboration

A propos de : O. Stahl

MONS pro-am collaboration

A propos de : Ba. Stober

MONS pro-am collaboration

A propos de : Be. Stober

MONS pro-am collaboration

A propos de : N. G. Correia Viegas

MONS pro-am collaboration

A propos de : K. Vollmann

MONS pro-am collaboration