# Analysis of $\alpha$ Centauri AB including seismic constraints

@article{Eggenberger2004AnalysisO,
title={Analysis of \$\alpha\$ Centauri AB including seismic constraints},
author={Patrick Eggenberger and Corinne Charbonnel and Suzanne Talon and Georges Meynet and Andre Maeder and Fabien Carrier and G. Bourban},
journal={Astronomy and Astrophysics},
year={2004},
volume={417},
pages={235-246}
}
• Published 29 January 2004
• Geology
• Astronomy and Astrophysics
Detailed models of α  Cen A and B based on new seismological data for α  Cen B by Carrier & Bourban ([CITE]) have been computed using the Geneva evolution code including atomic diffusion. Taking into account the numerous observational constraints now available for the α  Cen system, we find a stellar model which is in good agreement with the astrometric, photometric, spectroscopic and asteroseismic data. The global parameters of the α Cen system are now firmly constrained to an age of $t=6.52… 85 Citations ## Tables from this paper ### On the uncertain nature of the core of α Cen A • Physics • 2016 High-quality astrometric, spectroscopic, interferometric and, importantly, asteroseismic observations are available for$\alpha$Cen A, which is the closest binary star system to earth. Taking all ### Asteroseismology of$\mathsf{\alpha}$Centauri A - Evidence of rotational splitting • Geology, Physics • 2007 Context. Asteroseismology provides a unique tool for studying stellar interiors. Recently p modes have been detected on the bright solar-like star α Cen A thanks to high-precision radial-velocity ### Models of α Centauri A and B with and without seismic constraints: time dependence of the mixing-length parameter The a Centauri (a Cen) binary system is a well-known stellar system with very accurate observational constraints on the structure of its component stars. In addition to the classical non-seismic ### Analysis of 70 Ophiuchi AB including seismic constraints • Physics, Geology • 2008 Context. The analysis of solar-like oscillations for stars belonging to a binary system provides a unique opportunity to probe the internal stellar structure and to test our knowledge of stellar ### The Solar and$\alpha$Centauri A and B models improved by opacity enhancement - a possible explanation for the oversize cool stars The Sun and$\alpha$Cen A and B are the nearest stars to us. Despite the general agreement between their models and seismic and non-seismic constraints, there are serious problems pertaining to ### Modeling β Virginis using seismological data • Geology • 2006 This paper presents the modeling of the F9 V star β Virginis based on seismological measurements. Using the Geneva evolution code including rotation and atomic diffusion, we find that two distinct ### New seismological results on the G0 IV eta Bootis • Physics • 2005 Several attempts have been made to detect solar-like oscillations in the G0 IV star η Boo. We present here new observations on this star simultaneously conducted with two spectrographs: Coralie ### Constraining fundamental stellar parameters using seismology. Application to α Centauri AB We apply the Levenberg-Marquardt minimization algorithm to seismic and classical observables of theαCen binary system in order to derive the fundamental parameters ofαCenA+B, and to analyze the ### Core properties of α Centauri A using asteroseismology • Geology, Physics • 2010 Context. A set of long and nearly continuous observations of α Centauri A should allow us to derive an accurate set of asteroseismic constraints to compare to models, and make inferences on the ## References SHOWING 1-10 OF 31 REFERENCES ### α Centauri AB • Physics • 2000 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 ### A new seismic analysis of Alpha Centauri • Geology • 2003 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 ### Evolutionary models and the p-mode oscillation spectrum of Alpha Centauri A and B • Physics • 1992 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 • Physics • 2002 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 ### The diameters of$\alpha$Centauri A and B - A comparison of the asteroseismic and VINCI/VLTI views • Physics • 2003 We compare the first direct angular diameter measurements obtained on our closest stellar neighbour, Centauri, to recent model diameters constrained by asteroseismic observations. Using the VINCI ### Evolution of the. cap alpha. centauri system • Physics • 1978 Astrometric data and an analysis of available photometry suggest that the masses, luminosities, and temperatures of the A and B components of ..cap alpha.. Centauri are, respectively, (1.11, 0.92( +- ### The planet search program at the ESO Coudé Echelle spectrometer - II. The$\alpha\$ Centauri system: Limits for planetary companions

• Physics, Geology
• 2001
In this article we present the results of the planet search program carried out at the ESO Coudé Echelle Spectrometer (CES) for components A and B of the α Centauri system. Since November 1992 we

### Stellar Turbulent Convection: A New Model and Applications

• Physics
• 1991
Improvements of the mixing-length theory (MLT) of turbulent convection in stellar atmospheres are developed theoretically. It is pointed out that inaccuracies are introduced into MLT by the

### A standard stellar library for evolutionary synthesis - II. The M dwarf extension

• Physics
• 1998
A standard library of theoretical stellar spectra intended for multiple synthetic photometry applications including spectral evolutionary synthesis is presented. The grid includes M dwarf model

### Further improvements of a new model for turbulent convection in stars

• Physics
• 1992
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