most citedThe S2N2 metallicity calibrator and the abundance gradient of M 33

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astro-ph2007★ 29 cited

The S2N2 metallicity calibrator and the abundance gradient of M 33

K. Viironen, G. Delgado-Inglada, A. Mampaso +2

We introduce the log(Ha/[SII]6717+6731) vs. log(Ha/[NII]6583) (S2N2) diagnostic diagram as metallicity and ionisation parameter indicator for HII regions in external galaxies. The…