The Alpha Centauri binary system

2008/04/30 by G. F. Porto de Mello, Wladimir Lyra, W. Lyra +2 · 6 citations
Mathematics · Physics and Astronomy · #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Binary number #Binary system #Context (archaeology) #Diagram #Effective temperature #Extant taxon #Ionization #Mathematics #Physics #Spectral line #Stars #Statistics #Stellar atmosphere #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1051/0004-6361:200810031

17 pages, 10 figures, accepted by A&A. Replacing the older version with this new, refereed, one. Main modifications concern an updated discussion of the impact of systematic offsets between different temperature scales and non-LTE effects on the determination of abundances and atmospheric parameters. The abstract is abridged

arxiv created 2008/06/17 · openalex publication_date 2008/07/09 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/31

Abstract

Context. The α Centauri binary system, owing to its duplicity, proximity and brightness, and its components' likeness to the Sun, is a fundamental calibrating object for the theory of stellar structure and evolution and the determination of stellar atmospheric parameters. This role, however, is hindered by a considerable disagreement in the published analyses of its atmospheric parameters and abundances.

Citations

• Analysis ofα Centauri AB including seismic constraints
• α-, r-, and s-process element trends in the Galactic thin and thick disks
• Oxygen from the λ7774 High‐Excitation Triplet in Open Cluster Dwarfs: Hyades
• Accurate fundamental parameters for lower main-sequence stars
• Constraining fundamental stellar parameters using seismology. Application to Alpha Centauri AB
• Models of Centauri A and B with and without seismic constraints: time dependence of the mixing-length parameter
• Transformations from Theoretical Hertzsprung-Russell Diagrams to Color-Magnitude Diagrams: Effective Temperatures, B-V Colors, and Bolometric Corrections
• Effective temperature scale and bolometric corrections from 2MASS photometry
• Constraining the difference in convective blueshift between the components ofαCentauri with precise radial velocities
• The Chemical Composition of α Cen A: Strong Lines and the ABO Theory of Collisional Line Broadening
• Evolutionary tracks and isochrones for low- and intermediate-mass stars: From 0.15 to 7 M_\odot, and from Z=0.0004 to 0.03
• A new seismic analysis of Alpha Centauri
• The age of the Galactic thin disk from Th/Eu nucleocosmochronology
• Chemical abundances of planet-host stars

Cited by

• Accurate fundamental parameters for 23 bright solar-type stars
• Time evolution of high-energy emissions of low-mass stars
• Core properties ofαCentauri A using asteroseismology
• The radii and limb darkenings ofαCentauri A and B
• GaiaFGK benchmark stars: Effective temperatures and surface gravities
• Density Conversion between 1D and 3D Stellar Models with 1DMESA2HYDRO3D

Related

• α Centauri revisited: 2nd epoch ALMA observations
• Alpha Centauri: Disc Dynamics, Planet Stability, Detectability
• A Determination of the Chemical Composition of Alpha Centauri A from\n Strong Lines
• The importance of binary stars
• Report IAU Comm. 42, Close Binary Stars