Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...252..689s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 252, no. 2, Dec. 1991, p. 689-692.
Astronomy and Astrophysics
Astrophysics
88
Dwarf Stars, Forbidden Transitions, Line Spectra, Oxygen, Stellar Composition, Stellar Spectrophotometry, Abundance, Globular Clusters, Iron, Metallicity, Red Giant Stars, Stellar Evolution
Scientific paper
The oxygen abundance is redetermined in a few metal-poor dwarfs, using the oxygen forbidden line at 630 nm rather than the oxygen triplet at 777 nm previously used by Abia and Rebolo (1989). The ratios form O/Fe are clearly lower than the previous ones and are in agreement with the ratios found in the metal-poor red giants, suggesting that no real difference exists between dwarfs and giants. Finally, it can be argued that, pending the acquisition of additional information, the oxygen abundances derived from the forbidden line are more reliable than the abundances found from the triplet.
Spite Francois
Spite Monique
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