| Issue |
A&A
Volume 392, Number 1, September II 2002
|
|
|---|---|---|
| Page(s) | L9 - L12 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20021074 | |
| Published online | 22 August 2002 | |
Letter to the Editor
Asteroseismology and calibration of α Cen binary system
1
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
Received:
24
May
2002
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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