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Modeling the winds and magnetospheres of active OB stars

Published online by Cambridge University Press:  12 July 2011

Richard H. D. Townsend
Richard H. D. Townsend*
Affiliation:
Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA
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Abstract

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After briefly reviewing the theory behind the radiative line-driven winds of OB stars, I examine the processes that can generate structure in them; these include both intrinsic instabilities, and surface perturbations such as pulsation and rotation. I then delve into wind channeling and confinement by magnetic fields as a mechanism for forming longer-lived circumstellar structures. With a narrative that largely follows the historical progression of the field, I introduce the key insights and results that link the first detection of a magnetosphere, over three decades ago, to the recent direct measurement of magnetic braking in a number of active OB stars.

Keywords

magnetohydrodynamics: MHDstars: early-typestars: emission-linestars: magnetic fieldsstars: mass lossstars: rotationstars: 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. 148 - 159
Copyright
Copyright © International Astronomical Union 2011

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