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Short-term instabilities in γ Velorum: a search for strange modes in variable stars

Published online by Cambridge University Press:  12 April 2016

John Bentley  and
P.L. Cottrell
John Bentley
Affiliation:
Mt. John University Observatory, Department of Physics & Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand
P.L. Cottrell
Affiliation:
Mt. John University Observatory, Department of Physics & Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand

Abstract

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Strange mode instabilities in Wolf-Rayet stars have been proposed as the cause of clumping in the stellar wind. This, in turn, is suggested as a cause of line profile variations found on short time scales. High-frequency, short-duration, time-series spectroscopy was performed on the Wolf-Rayet star γ Velorum and analysis confirmed the results of a previous study of γ Velorum’s stellar wind which showed that the wind is indeed clumped, most likely from the predicted strange mode pulsations.

Type
Part 4. Early-type stars: B, A and F pulsators
Information
International Astronomical Union Colloquium , Volume 193: Variable Stars in the Local Group , 2004 , pp. 247 - 250
Copyright
Copyright © Astronomical Society of the Pacific 2004

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