| 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) | 175 - 182 | |
| Section | Seismology and Stellar Structure, Evolution and Rotation | |
| DOI | https://doi.org/10.1051/eas/1982017 | |
| Published online | 21 June 2019 | |
A.S. Brun, S. Mathis, C. Charbonnel and B. Dubrulle (eds)
EAS Publications Series, 82 (2019) 175-182
The mic-mac connection inside stars: the interdependence of atomic diffusion and hydrodynamic instabilities
Université de Toulouse, UPS-OMP, IRAP, France and CNRS, IRAP, 14 avenue Edouard Belin, 31400 Toulouse, France
The interdependence of microscopic (atomic) and macroscopic (hydrodynamic) processes inside stars and their consequences for stellar structure and evolution were recognized by Jean-Paul Zahn several decades ago. He was a pioneer in that respect, discussing the importance of the macroscopic motions related to stellar rotation, in competition with the chemical stratification induced by gravitational settling and radiative accelerations. This has been much developed in recent years, in connection with the improvement of observational data, including asteroseismology. Morover, it has been recently discovered that the microscopic atomic diffusion processes can lead to macroscopic results which may infuence in a non negligible way the internal stellar structure, independently of the abundances observed at the surface.
© EAS, EDP Sciences, 2019