Carbon, nitrogen, and oxygen abundances in Sirius and VEGA

Carbon, nitrogen, and oxygen abundances are obtained from C I, N I, and O I high excitation permitted lines in the spectra of the standard A star Vega and the ''hot'' Am star Sirius. Vega has normal abundances. Relative to Vega, Sirius is C deficient by 0.60 dex, N enhanced by 0....

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Veröffentlicht in:	Astrophys. J.; (United States) 1982-03, Vol.254, p.663
Hauptverfasser:	Lambert, D. L., Roby, S. W., Bell, R. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources ABUNDANCE ATMOSPHERES CARBON CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ELEMENTS MAIN SEQUENCE STARS MATHEMATICAL MODELS NITROGEN NONMETALS OXYGEN STAR MODELS STARS STELLAR ATMOSPHERES
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Beschreibung
Zusammenfassung:	Carbon, nitrogen, and oxygen abundances are obtained from C I, N I, and O I high excitation permitted lines in the spectra of the standard A star Vega and the ''hot'' Am star Sirius. Vega has normal abundances. Relative to Vega, Sirius is C deficient by 0.60 dex, N enhanced by 0.22 dex, and O deficient by 0.27 dex.
ISSN:	0004-637X 1538-4357
DOI:	10.1086/159777