paper

[O III]/[N II] as an Abundance Indicator at High Redshift

arXiv:astro-ph/0401128 · doi:10.1111/j.1365-2966.2004.07591.x

Abstract

Among `empirical' methods of estimating oxygen abundances in extragalactic HII regions, the use of the ratio of nebular lines of [O III] and [N II], first introduced by Alloin et al. in 1979, is reappraised with modern calibration data and shown to have certain advantages over R23 = ([O II] + [O III])/Hbeta and N2 = [NII] 6583/Halpha, particularly when applied to star-forming galaxies at high redshifts.

5 pages including 2 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society

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