An elemental abundance analysis of the superficially normal A star VEGA

Details An elemental abundance analysis of the superficially normal A star VEGA An elemental abundance analysis of the superficially normal A star VEGA

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348..712a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 348, Jan. 10, 1990, p. 712-717. Research supported by the Citadel Developme

Astronomy and Astrophysics

Astrophysics

60

A Stars, Metallicity, Spectrum Analysis, Stellar Composition, Stellar Spectra, Astronomical Photometry, Early Stars, Helium, Peculiar Stars

Scientific paper

An elemental abundance analysis of Vega has been performed using high-signal-to-noise 2.4 A/mm Reticon observations of the region 4313-4809 A. Vega is found to be a metal-poor star with a mean underabundance of 0.60 dex. The He/H ratio of 0.03 as derived from He I 4472 A suggests that the superficial helium convection zone has disappeared and that radiative diffusion is producing the photospheric abundance anomalies.

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