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Dynamics and variability of winds in WR+O binaries

Published online by Cambridge University Press:  25 May 2016

Kenneth G. Gayley  and
Stanley P. Owocki
Kenneth G. Gayley
Affiliation:
Departement of Physics and Astronomy, University of Iowa, Iowa City, IA, USA
Stanley P. Owocki
Affiliation:
Bartol Research Institute, University of Delaware, Newark, DE, USA

Abstract

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The presence of a nearby O star offers the potential for studying the response of a Wolf-Rayet wind to external irradiation from a well-understood UV source. The O starlight offers not only a passive diagnostic probe, but also the potential for a dynamical interaction whose nature relates directly to fundamental issues of how WR winds are driven. It may even decelerate the WR wind prior to the wind/wind interaction, an effect we term radiative braking. We report on recent progress in WR+O wind-wind interaction models that incorporate the influence of the O starlight on the incident WR wind, and also the effect of the WR starlight on the acceleration of the O-star wind. A recurrent theme is the importance of feedback between the line force and the gas dynamics, and the leveraging that results.

Type
Part 2. Models for single star evolution of massive stars: wind + atmosphere + interior
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 168 - 176
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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