Chemical abundances of Seyfert 2 AGNs -II. N2 metallicity calibration based on SDSS

We present a semi-empirical calibration between the metallicity (Z) of Seyfert 2 Active Galactic Nuclei and the N2=log([N II]\lambda6584/H\alpha) emission-line intensity ratio. This calibration was derived through the [O III]\lambda5007/[O II]\lambda3727 versus N2 diagram containing observational data and photoionization model results obtained with the Cloudy code. The observational sample consists... Show more