Asteroseismology and calibration of alpha cen binary system

  title={Asteroseismology and calibration of alpha cen binary system},
  author={F. Th{\'e}venin and Janine Provost and P. Morel and Gabrielle Berthomieu and François Bouchy and Fabien Carrier},
  journal={Astronomy and Astrophysics},
Using the oscillation frequencies of Cen A recently discovered by Bouchy & Carrier (2001, 2002), the available astrometric, photometric and spectroscopic data, we tried to improve the calibration of the visual binary system Cen. With the revisited masses of Pourbaix et al. (2002) we did not succeed in obtaining a solution satisfying all the seismic observational constraints. Relaxing the constraints on the masses, we have found an aget Cen= 4850500 Myr, an initial helium mass fraction Yi= 0… 

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