SIMBAD references

2017MNRAS.467.1507C - Mon. Not. R. Astron. Soc., 467, 1507-1514 (2017/May-2)

New metallicity calibration for Seyfert 2 galaxies based on the N2O2 index.


Abstract (from CDS):

We derive a new relation between the metallicity of Seyfert 2 active galactic nuclei (AGNs) and the intensity of the narrow emission-lines ratio N2O2 = log([N II] λ6584/[O II] λ3727). The calibration of this relation was performed by determining the metallicity (Z) of a sample of 58 AGNs through a diagram containing the observational data and the results of a grid of photoionization models obtained with the CLOUDY code. We find the new Z/Z-N2O2 relation using the obtained metallicity values and the corresponding observational emission-line intensities for each object of the sample. Estimations derived through the use of this new calibration indicate that the narrow-line regions of Seyfert 2 galaxies exhibit a large range of metallicities (0.3 <= Z/Z <= 2.0), with a median value Z ≃ Z. Regarding the possible existence of correlations between the luminosity L(Hβ), the electron density and the colour excess E(B - V) with the metallicity in this kind of objects, we do not find correlations between them.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: abundances - galaxies: evolution - galaxies: formation - galaxies: general - galaxies: ISM - galaxies: ISM

CDS comments: In table 1 : Mrk 226SW is a misprint for Mrk 266SW

Simbad objects: 54

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