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Probing turbulence with seismic observations of α Centauri

Published online by Cambridge University Press:  01 August 2006

C. W. Straka ,
P. Demarque  and
F. J. Robinson
C. W. Straka
Affiliation:
Department of Astronomy, Yale University, New Haven, CT 06520-8101, USA email: straka@astro.yale.edu, pierre.demarque@yale.edu
P. Demarque
Affiliation:
Department of Astronomy, Yale University, New Haven, CT 06520-8101, USA email: straka@astro.yale.edu, pierre.demarque@yale.edu
F. J. Robinson
Affiliation:
Department of Astronomy, Yale University, New Haven, CT 06520-8101, USA email: straka@astro.yale.edu, pierre.demarque@yale.edu Department of Geology and Geophysics, Yale University, New Haven, CT 06520-8101, USA email: marjf@astro.yale.edu
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Abstract

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We present two 3D Large Eddy Simulations (LES) of the convection-radiation transition layer for both the A and the B component of the α Centauri binary system. Theoretical oscillation spectra are then calculated from stellar evolutionary models that include the effects of turbulence based on the LES simulations. By taking both non-seismic and seismic observational constraints into account we discuss the possibility to probe turbulence beyond standard 5mixing-length-theory in a star other than Sun.

Keywords

Turbulencemethods: numericalstars: individual (α Cen A, B)stars: oscillations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S239: Convection in Astrophysics , August 2006 , pp. 388 - 390
Copyright
Copyright © International Astronomical Union 2007

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