Oxygen abundances: new results from [O I] lines

Details Oxygen abundances: new results from [O I] lines Oxygen abundances: new results from [O I] lines

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001newar..45..513s&link_type=abstract

New Astronomy Reviews, Volume 45, Issue 8, p. 513-518.

Astronomy and Astrophysics

Astronomy

12

Scientific paper

Supersolar oxygen-to-iron ratios are known to exist in nearly all metal-poor stars. But there is no general agreement on the magnitude of these relative overabundances. New high resolution spectra of evolved stars over a large metallicity range have been gathered, from which lines of [O I], Sc II, and Fe II have been measured. Abundance ratios [O/Sc] and [O/Fe], insensitive to most model atmospheric uncertainties, have been derived and correlated with overall metallicity. These ratios both are consistent with earlier studies of the [O I] lines in metal-poor stars: [O/Sc]~=[O/Fe]~=+0.4, with possibly a small upward trend with decreasing [Fe/H].

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