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The ‘momentum problem’ of Wolf-Rayet stars: can it be explained by the multiple scattering mechanism?

Published online by Cambridge University Press:  07 August 2017

U. Springmann  and
J. Puls
U. Springmann
Affiliation:
Institut für Astronomie und Astrophysik der Universität München, Scheinerstraße 1, D-81679 München, B.R. Deutschland
J. Puls
Affiliation:
Institut für Astronomie und Astrophysik der Universität München, Scheinerstraße 1, D-81679 München, B.R. Deutschland

Abstract

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The possibility of driving the dense winds of Wolf-Rayet stars via multiple scattering of photons in resonance lines is examined. For the case of many overlapping lines it is found that the diffuse radiation arising from the multiple scattering process leads to a radiative acceleration grad even larger than the commonly used unattenuated flux models where each line is assumed to interact separately with the unattenuated photospheric flux. The radial dependence of grad in the outer parts of the wind is now weaker than r−2, which in turn leads to a steeper rise in the velocity field.

Keywords

Radiative transferscatteringstars: mass lossstars: Wolf-Rayet
Type
Session II - Model atmospheres for single Wolf-Rayet stars
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 170 - 171
Copyright
Copyright © Kluwer 1995 

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