The dependence of some metallicity calibrations of strong-line ratios on nitrogen enrichment history

Y. C. Liang; S. Y. Yin

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The dependence of some metallicity calibrations of strong-line ratios on nitrogen enrichment history

Y. C. Liang·S. Y. Yin

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Abstract

We show the dependence of the Bayesian and the N2-derived oxygen abundances on the N-enrichment history of the star-forming galaxies. We select 531 metal-poor and ~20,000 metal-rich galaxies from the SDSS database for this study. Their "accurate" O/H abundances are obtained from Te and P-method, respectively. The discrepancies of the Bayesian and N2-derived abundances from these two "accurate" abundances show obvious correlations with log(N/O) abundance ratios.

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Y. C. Liang, S. Y. Yin. 2007-01-09. The dependence of some metallicity calibrations of strong-line ratios on nitrogen enrichment history. https://arxiv.org/abs/astro-ph/0701231

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