A new seismic analysis of Alpha Centauri

@article{Thoul2003ANS,
  title={A new seismic analysis of Alpha Centauri},
  author={Anne Thoul and Richard Scuflaire and Arlette Noels and Benjamin Vatovez and Maryline Briquet and M-A. Dupret and Josefina Montalb{\'a}n},
  journal={Astronomy and Astrophysics},
  year={2003},
  volume={402},
  pages={293-297}
}
Models of α Cen A &Bh avebeen computed using the masses determined by Pourbaix et al. (2002) and the data derived from the spectroscopic analysis of Neuforge & Magain (1997). The seismological data obtained by Bouchy & Carrier (2001, 2002) do help improve our knowledge of the evolutionary status of the system. All the constraints are satisfied with a model which gives an age of about 6 Gyr for the binary. 
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References

SHOWING 1-10 OF 23 REFERENCES

Asteroseismology and calibration of alpha cen binary system

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…

Evolutionary models and the p-mode oscillation spectrum of Alpha Centauri A and B

Spectroscopically observed abundances of Furenlid and Meylan (1990) and Los Alamos Opacity Library opacities specifically constructed for this mixture are used to construct the most detailed models…

Constraining the difference in convective blueshift between the components of alpha Centauri with precise radial velocities

New radial velocities of Cen A & B obtained in the framework the Anglo-Australian Planet Search programme as well as in the CORALIE programme are added to those by Endl et al. (2001) to improve the…

Seismic Tests of the Sun's Interior Structure, Composition, and Age, and Implications for Solar Neutrinos

The structure of the deep interior of a variety of standard and nonstandard solar models constrained by the low-l p-mode oscillation data from GONG are presented. For standard models, we show that…

α Centauri AB

Detailed models of α Centauri A and B based on the Hipparcos, Yale, and Söderhjelm parallaxes are compared. The consequences of the uncertainty in mass, luminosity, surface temperature, and…

P-mode observations on Alpha Cen A

We have made a clear detection of p-mode oscillations in the nearest solar-like G2V star $\alpha$ Cen A with the CORALIE spectrograph on the 1.2-m Swiss telescope at the ESO La Silla Observatory. We…

The acoustic spectrum of alpha Cen A

This paper presents the analysis of Doppler p-mode observations of the G2V star a Cen A obtained with the spectrograph CORALIE in May 2001. Thirteen nights of observations have made it possible to…

Further improvements of a new model for turbulent convection in stars

The effects of including a variable molecular weight and of using the newest opacities of Rogers and Iglesias (1991) as inputs to a recent model by Canuto and Mazzitelli (1991) for stellar turbulent…

Low-Temperature Rosseland Opacities

A new, comprehensive set of low-temperature opacity data has been assembled. From this basic data set, Rosseland and Planck mean opacities have been computed for temperatures between 12,500 and 700…

Consistent Evolution of F Stars: Diffusion, Radiative Accelerations, and Abundance Anomalies

Consistent stellar evolution models of F stars (1.1-1.5 M☉) are calculated with radiative forces, opacities, and diffusion for all elements included in OPAL's opacity tables. The opacities and…