| Issue |
EAS Publications Series
Volume 82, 2019
Astro Fluid: An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements
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|---|---|---|
| Page(s) | 137 - 151 | |
| Section | Seismology and Stellar Structure, Evolution and Rotation | |
| DOI | https://doi.org/10.1051/eas/1982014 | |
| Published online | 21 June 2019 | |
A.S. Brun, S. Mathis, C. Charbonnel and B. Dubrulle (eds)
EAS Publications Series, 82 (2019) 137-151
The impact of Jean-Paul Zahn discoveries on rotation and evolution
Department of Astronomy, University of Geneva, Switzerland
We first review the main effects of stellar rotation on evolution along the fundamental discoveries by Jean-Paul. Then, we examine some of the consequences of rotation in the evolution of single and binary stars. The proper account of meridional circulation in close binaries tends to increase the synchronization time because meridional currents always counteract the tidal interaction. We consider the case of the very low metallicity Z stars, in particular the CEMP-no stars, where rotational mixing may have played a dominant role in their strange chemical composition. Then, turning to “What are the mysteries?”, we emphasize that all over the evolution and for various masses the present models seem to still have a lack of rotational coupling between cores and envelopes. We suggest that magnetic fields may produce this missing internal coupling.
© EAS, EDP Sciences, 2019