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Physics of rotation: problems and challenges

Published online by Cambridge University Press:  23 January 2015

Andre Maeder  and
Georges Meynet
Andre Maeder
Affiliation:
Geneva Observatory, University of Geneva email: [email protected]
Georges Meynet
Affiliation:
Geneva Observatory, University of Geneva email: [email protected]
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Abstract

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We examine some debated points in current discussions about rotating stars: the shape, the gravity darkening, the critical velocities, the mass loss rates, the hydrodynamical instabilities, the internal mixing and N–enrichments. The study of rotational mixing requires high quality data and careful analysis. From recent studies where such conditions are fulfilled, rotational mixing is well confirmed. Magnetic coupling with stellar winds may produce an apparent contradiction, i.e. stars with a low rotation and a high N–enrichment. We point out that it rather confirms the large role of shears in differentially rotating stars for the transport processes. New models of interacting binaries also show how shears and mixing may be enhanced in close binaries which are either spun up or down by tidal interactions.

Keywords

Stellar PhysicsStellar rotationStellar evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 9 - 19
Copyright
Copyright © International Astronomical Union 2015 

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