Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-27T16:18:40.627Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

References

Bedding, T. R. & Kjeldsen, H. 2003, Pub. Astron. Soc. Aus., 20, 203CrossRefGoogle Scholar
Bedding, T. R., Kjeldsen, H., Butler, R. P., McCarthy, C., et al. 2004, Astrophys. J., 614, 380CrossRefGoogle Scholar
Böhm-Vitense, E. 1958, Zeitschrift für Astrophysik, 46, 108Google Scholar
Bouchy, F. & Carrier, F. 2002, Aastron. & Astrophys., 390, 205CrossRefGoogle Scholar
Carrier, F. & Bourban, G. 2003, Aastron. & Astrophys., 406, L23CrossRefGoogle Scholar
Kervella, P., Thévenin, F., Ségransan, D., et al. 2003, Aastron. & Astrophys., 404, 1087CrossRefGoogle Scholar
Kim, Y.-C. & Chan, K.L. 1998, Astrophys. J., 496, L121CrossRefGoogle Scholar
Kjeldsen, H., Bedding, T. R., Viskum, M. & Frandsen, S. 1995, Astron. J., 109, 1313CrossRefGoogle Scholar
Kjeldsen, H., et al. 2005, Astrophys. J., 635, 1281CrossRefGoogle Scholar
Kuhfuss, R. 1986, Aastron. & Astrophys., 160, 116Google Scholar
Li, L. H., Robinson, F. J., Demarque, P., Sofia, S., et al. 2002, Astrophys. J., 567, 1192CrossRefGoogle Scholar
Martić, M., et al. 1999, Aastron. & Astrophys., 351, 993Google Scholar
Miglio, A. & Montalbán, J. 2005, Aastron. & Astrophys., 441, 615CrossRefGoogle Scholar
Robinson, F. J., Demarque, P., Li, L. H., et al. 2003, Mon. Not. Roy. Astron. Soc., 340, 923CrossRefGoogle Scholar
Stein, R. F. & Nordlund, A. 1998, Astrophys. J., 499, 914CrossRefGoogle Scholar
Straka, C. W., Demarque, P., Guenther, D. B., Li, L., et al. 2006, Astrophys. J., 636, 1078CrossRefGoogle Scholar
Straka, C. W. & Demarque, P. 2006, Comp. Phys. Comm., submittedGoogle Scholar
Unno, W. & Spiegel, E. A. 1966, Publ. Aston. Soc. Japan, 18, 85Google Scholar