Abstract

view Abstract Citations (63) References (41) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS An Elemental Abundance Analysis of the Superficially Normal A Star VEGA Adelman, Saul J. ; Gulliver, Austin F. Abstract 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. Publication: The Astrophysical Journal Pub Date: January 1990 DOI: 10.1086/168279 Bibcode: 1990ApJ...348..712A Keywords: A Stars; Metallicity; Spectrum Analysis; Stellar Composition; Stellar Spectra; Astronomical Photometry; Early Stars; Helium; Peculiar Stars; Astrophysics; STARS: ABUNDANCES; STARS: EARLY-TYPE; STARS: INDIVIDUAL CONSTELLATION NAME: ALPHA LYRAE full text sources ADS | data products SIMBAD (4)

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