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Pulsations in Wolf-Rayet stars: observations with MOST

Published online by Cambridge University Press:  12 July 2011

André-Nicolas Chené  and
Anthony F. J. Moffat
André-Nicolas Chené
Affiliation:
Departamento de Física, Universidad de Concepción, Casilla 160-C, Concepción, Chile email: achene@astro-udec.cl National Research Council of Canada, Herzberg Institute of Astrophysics, 5071, West Saanich Road, Victoria (BC), V9E 2E7
Anthony F. J. Moffat
Affiliation:
Département de Physique, Université de Montréal, C. P. 6128, succ. centre-ville, Montréal (Qc) H3C 3J7 Centre de Recherche en Astrophysique du Québec, Canada email: moffat@astro.umontreal.ca
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Abstract

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Photometry of Wolf-Rayet (WR) stars obtained with the first Canadian space telescope MOST (Microvariability and Oscillations of STars) has revealed multimode oscillations mainly in continuum light that suggest stellar pulsations could be a significant contributing factor to the mass-loss rates. Since the first clear detection of a pulsation period of P = 9.8h in WR123, two other stars have also shown periods of a few days, which must be related to stellar pulsations.

Keywords

stars: Wolf-Rayetstars: oscillations (including pulsations)stars: 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. 445 - 450
Copyright
Copyright © International Astronomical Union 2011

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