Volume 392, Number 1, September II 2002
|Page(s)||L9 - L12|
|Published online||22 August 2002|
Letter to the Editor
Asteroseismology and calibration of α Cen binary system
Département Cassini, UMR CNRS 6529, Observatoire de la Côte d'Azur, BP 4229, 06304 Nice Cedex 4, France
2 Observatoire de Genève, 51 chemin des Maillettes, 1290 Sauverny, Switzerland
Corresponding author: F. Thévenin, Frederic.Thevenin@obs-nice.fr
Accepted: 22 July 2002
Using the oscillation frequencies of α Cen A recently discovered by Bouchy & Carrier ([CITE], [CITE]), the available astrometric, photometric and spectroscopic data, we tried to improve the calibration of the visual binary system α Cen. With the revisited masses of Pourbaix et al. ([CITE]) we did not succeed in obtaining a solution satisfying all the seismic observational constraints. Relaxing the constraints on the masses, we have found an age Myr, an initial helium mass fraction , and an initial metallicity , with and for α Cen A & B.
Key words: stars: binaries: visual / stars: evolution / stars: oscillation / stars: fundamental parameters / stars: individual: α Cen
© ESO, 2002
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