Oxygen abundances in unevolved metal-poor stars - Interpretation and consequences

Details Oxygen abundances in unevolved metal-poor stars - Interpretation and consequences Oxygen abundances in unevolved metal-poor stars - Interpretation and consequences

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347..186a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 1, 1989, p. 186-194.

Astronomy and Astrophysics

Astrophysics

165

Abundance, Galactic Evolution, Metallicity, Milky Way Galaxy, Oxygen, Stellar Composition, Astronomical Spectroscopy, Chemical Evolution, Dwarf Stars, Error Analysis, Galactic Structure, Red Giant Stars

Scientific paper

The oxygen abundance has been determined by analysis of the O I infrared triplet in 30 unevolved field stars of metallicities in the range Fe/H abundance ratio between -0.2 and -3.5. The data show that the O/Fe abundance ratio increases monotonically as metallicity decreases from solar, reaching values in the range 1.0-1.2 at an Fe/H abundance ratio of about -2. The results, when compared with those already published for metal-deficient red giants, suggest that oxygen could have been depleted in the latter. A discussion of the O/Fe abundance ratios in connection with the chemical evolution of the Galaxy is also presented.

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