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Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage

Published online by Cambridge University Press:  12 July 2011

Rémi Fahed ,
Anthony F. J. Moffat ,
Juan Zorec ,
Thomas Eversberg ,
André-Nicolas Chené ,
Filipe Alves ,
Wolfgang Arnold ,
Thomas Bergmann ,
Luis F. Gouveia Carreira  and
Filipe Marques Dias
...Show all authors
Rémi Fahed
Affiliation:
Université de Montréal, Montréal, Canada
Anthony F. J. Moffat
Affiliation:
Université de Montréal, Montréal, Canada
Juan Zorec
Affiliation:
Institut d'astrophysique de Paris, Paris, France
Thomas Eversberg
Affiliation:
Schnörringen Telescope Science Institute, Köln, Germany
André-Nicolas Chené
Affiliation:
Herzberg Institute of Astrophysics, Victoria, Canada
Michael F. Corcoran
Affiliation:
Laboratory for High Energy Astrophysics, Goddard Space Flight Center, Greenbelt, USA
Sean M. Dougherty
Affiliation:
Herzberg Institute for Astrophysics, Penticton, Canada
Julian M. Pittard
Affiliation:
University of Leeds, Leeds, UK
Andy M. T. Pollock
Affiliation:
ESA XMM-Newton Science Operations Centre, Villafranca del Castillo, Spain
Peredur M. Williams
Affiliation:
University of Edinburgh, Royal Observatory, Edinburgh, UK
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Abstract

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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.

Keywords

binaries: generalstars: fundamental parametersstars: Wolf-Rayetstars: windsoutflows
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 501 - 502
Copyright
Copyright © International Astronomical Union 2011

References

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