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- W2024761438 abstract "view Abstract Citations (111) References (26) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Oxygen Abundances in Halo Stars Bessell, Michael S. ; Sutherland, Ralph S. ; Ruan, Kui Abstract The present study determines the oxygen abundance for a sample of metal-poor G dwarfs by analysis of OH lines between 3080 and 3200 A and the permitted high-excitation far-red O I triple. The oxygen abundances determined from the low-excitation OH lines are up to 0.55 dex lower than those measured from the high-excitation O I lines. The abundances for the far-red O I triplet lines agree with those rederived from Abia and Rebolo (1989), and the abundances from the OH lines in dwarfs and giants are in agreement with the rederived O abundances of Barbuy (1988) and others from the forbidden resonance O I line. Because the chi = 0.1.7 eV OH lines are formed in the same layers as the majority of Fe, Ti, and other neutral metal lines used for abundance analyses, it is argued that the OH lines and the forbidden O I line yield the true oxygen abundances relative to the metals. Publication: The Astrophysical Journal Pub Date: December 1991 DOI: 10.1086/186244 Bibcode: 1991ApJ...383L..71B Keywords: Abundance; Dwarf Stars; G Stars; Halos; Oxygen; Stellar Atmospheres; Hydroxyl Emission; Iron; Line Spectra; Spectrum Analysis; Stellar Spectra; Astrophysics; ABUNDANCES; STARS: ATMOSPHERES; STARS: POPULATION II full text sources ADS | data products SIMBAD (10)" @default.
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- W2024761438 date "1991-12-01" @default.
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- W2024761438 title "Oxygen abundances in halo stars" @default.
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