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1980•Monthly Notices of the Royal Astronomical SocietyRequires access

A spectroscopic analysis of the Alpha Centauri system

Martin N. England

Open publisher page 17 citations

Abstract

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 α 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 α Cen A and α Cen B are calculated using effective temperatures from H α profiles and surface gravities from line profiles and ionization equilibrium.

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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 α 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 α Cen A and α Cen B are calculated using effective temperatures from H α profiles and surface gravities from line profiles and ionization equilibrium.

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Available abstract

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 α 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 α Cen A and α Cen B are calculated using effective temperatures from H α profiles and surface gravities from line profiles and ionization equilibrium.

Key concepts: Physics, Astrophysics, Spectral line, Ionization, Line (geometry), Astronomy, Ion, Geometry

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