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Wolf-Rayet star variability and wind inhomogeneities

Published online by Cambridge University Press:  07 August 2017

John C. Brown and
Lorna L. Richardson
John C. Brown
Affiliation:
Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland
Lorna L. Richardson
Affiliation:
Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland

Abstract

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The wind structure diagnostic possibilities offered by combined study of photo-, spectro-, and polari-metric variability are discussed using data from the Montreal group. These demand the presence in the wind of localised density inhomogeneities and in particular of large ‘blobs’ denser than the ‘mean’ wind and put bounds on the size, mass, and density of individual blobs and their distributions, with implications for theories of blob formation. Blobs responsible for polarimetric variability must be present at the stellar surface rather than forming in the wind, and the relation of this to spectrometric indications that blobs are only detectable at several stellar radii is discussed.

Keywords

stars: Wolf-Rayetwindspolarimetry

Information

Type
Session III - Anisotropic mass loss, disk formation
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995, pp. 186 - 190
Copyright
Copyright © Kluwer 1995 

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