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Rotation and Massive Close Binary Evolution

Published online by Cambridge University Press:  01 December 2007

Norbert Langer
Affiliation:
Astronomical Institute, Utrecht University, The Netherlands
Matteo Cantiello
Affiliation:
Astronomical Institute, Utrecht University, The Netherlands
Sung-Chul Yoon
Affiliation:
University of California, Santa Cruz, USA
Ian Hunter
Affiliation:
The Queen's University of Belfast, Northern Ireland, UK
Ines Brott
Affiliation:
Astronomical Institute, Utrecht University, The Netherlands
Danny Lennon
Affiliation:
Isaac Newton Group, Santa Cruz de La Palma, Canary Islands, Spain
Selma de Mink
Affiliation:
Astronomical Institute, Utrecht University, The Netherlands
Marcel Verheijdt
Affiliation:
Astronomical Institute, Utrecht University, The Netherlands
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Abstract

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We review the role of rotation in massive close binary systems. Rotation has been advocated as an essential ingredient in massive single star models. However, rotation clearly is most important in massive binaries where one star accretes matter from a close companion, as the resulting spin-up drives the accretor towards critical rotation. Here, we explore our understanding of this process, and its observable consequences. When accounting for these consequences, the question remains whether rotational effects in massive single stars are still needed to explain the observations.