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Can Pulsational Instabilities Impact a Massive Star's Rotational Evolution?

Published online by Cambridge University Press:  01 December 2007

Rich Townsend  and
Jim MacDonald
Rich Townsend
Affiliation:
Bartol Research Institute, University of Delaware, Newark, DE 19716, USA email : rhdt@bartol.udel.edu Department of Physics & Astronomy, University of Delaware, Newark, DE 19716, USA email : jimmacd@udel.edu
Jim MacDonald
Affiliation:
Department of Physics & Astronomy, University of Delaware, Newark, DE 19716, USA email : jimmacd@udel.edu
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Abstract

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We investigate whether angular momentum transport due to unstable pulsation modes can play a significant role in the rotational evolution of massive stars. We find that these modes can redistribute appreciable angular momentum, and moreover trigger shear-instability mixing in the molecular weight gradient zone adjacent to stellar cores, with significant evolutionary impact.

Keywords

stars: early-type – stars: rotation – stars: oscillations – stars: variables: other – instabilities – waves – methods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S250: Massive Stars as Cosmic Engines , December 2007 , pp. 161 - 166
Copyright
Copyright © International Astronomical Union 2008

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