Oxygen abundances in halo stars

Michael S. Bessell; Ralph S. Sutherland; Kui Ruan

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The Astrophysical Jo...arrow_drop_down

The Astrophysical Journal

Article . 1991 . Peer-reviewed

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https://dx.doi.org/10.1086/186...

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Oxygen abundances in halo stars

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 1991 English Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 383, page L71 (issn: 0004-637X, eissn: 1538-4357,

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Authors: Michael S. Bessell; Ralph S. Sutherland; Kui Ruan;

doi: 10.1086/186244

Oxygen abundances in halo stars

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Abstract

The oxygen abundance has been determined for a sample of metal-poor G dwarfs (−1.2<[Fe/H]<−2.7) in two independent ways; by analysis of OH lines between 3080-3200 A and the permitted high-excitation far-red O I triplet (7771-7775 A, χ=9.1 eV). 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

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