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Turbulent transport in stellar radiative zones

Published online by Cambridge University Press:  13 January 2006

G. Alecian ,
O. Richard ,
S. Vauclair ,
F. Lignières ,
N. Toqué  and
A. Vincent
F. Lignières
Affiliation:
Laboratoire d'Astrophysique de Toulouse et Tarbes, Observatoire Midi-Pyrénées, 14 avenue É. Belin, 31400 Toulouse, France
N. Toqué
Affiliation:
Laboratoire d'Astrophysique de Toulouse et Tarbes, Observatoire Midi-Pyrénées, 14 avenue É. Belin, 31400 Toulouse, France
A. Vincent
Affiliation:
Département de Physique, Université de Montréal, CP. 6128, Succ. A, Montréal, Québec H3C 3J7, Canada
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Abstract

Abundances anomalies and helioseismology provideconstraints on the turbulent transport of chemical species in stellar radiativezone. We use these constraints to derive upper bounds on thevelocity and lengthscale of the vertical turbulent motions.We also present numerical simulations showingthat a strong anisotropy between horizontal and vertical motionscould help understand the observed transport.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 17: Element Stratification in Stars: 40 Years of Atomic Diffusion , 2005 , pp. 209 - 214
Copyright
© EAS, EDP Sciences, 2005

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