SIMBAD references

2007MNRAS.381.1719V - Mon. Not. R. Astron. Soc., 381, 1719-1726 (2007/November-2)

The S2N2 metallicity calibrator and the abundance gradient of M33.

VIIRONEN K., DELGADO-INGLADA G., MAMPASO A., MAGRINI L. and CORRADI R.L.M.

Abstract (from CDS):

We introduce the log(Hα/[SII]λλ6717+6731) versus log(Hα/[NII]λ6583) (S2N2) diagnostic diagram as a metallicity and ionization parameter indicator for HII regions in external galaxies. The location of HII regions in the S2N2 diagram was studied both empirically and theoretically. We found that, for a wide range of metallicities, the S2N2 diagram gives single-valued results in the metallicity-ionization parameter plane. We demonstrate that the S2N2 diagram is a powerful tool to estimate metallicities of high-redshift (z ∼ 2) HII galaxies. Finally, we derive the metallicity for 76 HII regions in M33 from the S2N2 diagram and calculate an O/H abundance gradient for this galaxy of -0.05 (±0.01) dex k/pc.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): HII regions - galaxies: abundances - galaxies: high-redshift - galaxies: individual: M33

Simbad objects: 218

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2020.12.03-18:38:24

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