68 citations · 346 across the 11 of their papers we have counts for
11 papers
Chemical abundances in Seyfert galaxies X. Sulphur abundance estimates
O. L. Dors, M. Valerdi, R. A. Riffel +12
For the first time, the sulphur abundance relative to hydrogen (S/H) in the Narrow Line Regions of a sample of Seyfert 2 nuclei (Sy 2s) has been derived via direct estimation of th…
Chemical abundance of LINER galaxies -- Metallicity calibrations based on SDSS-IV MaNGA
C. B. Oliveira, A. C. Krabbe, J. A. Hernandez-Jimenez +5
The ionizing source of Low Ionization Nuclear Emission Regions (LINERs) is uncertain. Because of this, an empirical relation to determine the chemical abundances of these objects h…
Chemical Abundance of the LINER galaxy UGC 4805 with SDSS-IV MaNGA
A. C. Krabbe, C. B. Oliveira, I. A. Zinchenko +5
Chemical abundance determinations in Low-Ionization Nuclear Line Regions (LINERs) are especially complex and uncertain because the nature of the ionizing source of this kind of obj…
Chemical abundances of Seyfert 2 AGNs-III. Reducing the oxygen abundance discrepancy
O. L. Dors, R. Maiolino, M. V. Cardaci +4
We investigate the discrepancy between oxygen abundance estimations for narrow-line regions (NLRs) of Active Galactic Nuclei (AGNs) type Seyfert 2 derived by using direct estimatio…
Chemical abundances of Seyfert 2 AGNs II. N2 metallicity calibration based on SDSS
S. P. Carvalho, O. L. Dors, M. V. Cardaci +6
We present a semi-empirical calibration between the metallicity () of Seyfert 2 Active Galactic Nuclei and the =log([N II]6584/H) emission-line intensity ratio. This c…
Effective temperature of ionizing stars of extragalactic HII regions -- II: nebular parameter relations based on CALIFA data
I. A. Zinchenko, O. L. Dors, G. F. Hagele +2
We calculate the effective temperature () of ionizing star(s), oxygen abundance of the gas phase , and the ionization parameter for a sample of H\,{\sc…