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Two-dimensional models of fast rotating stars and mixing processes

Published online by Cambridge University Press:  29 August 2024

Michel Rieutord Open the ORCID record for Michel Rieutord [Opens in a new window]  and
Damien Gagnier
Michel Rieutord*
Affiliation:
IRAP, Université de Toulouse, CNRS, UPS, CNES, 14, avenue Édouard Belin, F-31400 Toulouse, France
Damien Gagnier*
Affiliation:
Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, V Holešovič kách R, Prague 8, 18000, Czech Republic
*
email: [email protected]
email: [email protected]
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Abstract

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In this short review we present the recent progresses in modelling fast rotating stars in two dimensions. We thus give a brief description of the features of the public domain code ESTER that can compute self-consistently the structure and the large-scale flows (differential rotation and meridional circulation) of an axisymmetric stellar model of a (fast) rotating early-type main sequence star. We illustrate these modelling with the recent results obtained on Altair, a nearby extremely fast rotator. We then discuss the various way mixing takes place in the stably stratified radiative envelope of early-type stars, and especially in massive ones where the radiative winds add a new source of large-scale flows, which are shown to be strongly anisotropic and very difficult to represent in one dimension.

Keywords

Rotationearly-type starsspin-down
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 359 - 368
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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