A spectroscopic analysis of the Alpha Centauri system

Details A spectroscopic analysis of the Alpha Centauri system A spectroscopic analysis of the Alpha Centauri system

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191...23e&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 191, Apr. 1980, p. 23-35.

Astronomy and Astrophysics

Astronomy

19

Abundance, Chemical Composition, Spectroscopic Analysis, Stellar Atmospheres, Stellar Spectra, Absorption Spectra, Atmospheric Models, Stellar Gravitation, Stellar Temperature, Thermodynamic Equilibrium

Scientific paper

The chemical composition of the major components of the bright, nearby system of Alpha Centauri is derived using high dispersion spectra. The abundances of 16 elements are found using a differential curve of growth analysis. The abundances indicate that both components of the Alpha Cen system are twice as metal-rich as the sun. This is evidence for the two components having a common origin. Scaled solar LTE model atmospheres for Alpha Cen A and Alpha Cen B are calculated using effective temperatures from H alpha profiles and surface gravities from line profiles and ionization equilibrium.

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