SIMBAD references

2002A&A...392L...9T - Astronomy and Astrophysics, volume 392L9-12 (2002/9-2)

Asteroseismology and calibration of α Cen binary system.

THEVENIN F., PROVOST J., MOREL P., BERTHOMIEU G., BOUCHY F. and CARRIER F.

Abstract (from CDS):

Using the oscillation frequencies of α CenA recently discovered by Bouchy & Carrier (2001A&A...374L...5B, 2002A&A...390..205B), the available astrometric, photometric and spectroscopic data, we tried to improve the calibration of the visual binary system αCen. With the revisited masses of Pourbaix et al. (2002A&A...386..280P) 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 tαCen=4850±500Myr, an initial helium mass fraction Yi=0.300±0.008, and an initial metallicity (Z/X)i=0.0459±0.0019, with MA=1.100±0.006M☉ and MB=0.907±0.006M☉ for α Cen A & B.

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Journal keyword(s): stars: binaries: visual - stars: evolution - stars: oscillation - stars: fundamental parameters - stars: individual: α Cen

Simbad objects: 3

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