Chemical abundances in Seyfert galaxies – VII. Direct abundance determination of neon based on optical and infrared emission lines

  title={Chemical abundances in Seyfert galaxies – VII. Direct abundance determination of neon based on optical and infrared emission lines},
  author={Mark Kojo Armah and Oli L Dors and Catarina P. Aydar and M V Cardaci and Guillermo F. H{\"a}gele and Anna Feltre and Rog{\'e}rio Riffel and Rog{\'e}rio Riffel and A C Krabbe},
  journal={Monthly Notices of the Royal Astronomical Society},
  • M. Armah, O. Dors, +6 authors A. Krabbe
  • Published 10 September 2021
  • Physics
  • Monthly Notices of the Royal Astronomical Society
For the first time, neon abundance has been derived in the narrow line region from a sample of Seyfert 2 nuclei. In view of this, we compiled from the literature fluxes of optical and infrared (IR) narrow emission lines for 35 Seyfert 2 nuclei in the local universe ($z \:\lesssim \:0.06$). The relative intensities of emission lines were used to derive the ionic and total neon and oxygen abundances through electron temperature estimations (Te-method). For the neon, abundance estimates were… 


New quantitative nitrogen abundance estimations in a sample of Seyfert 2 active galactic nuclei
We obtained new quantitative determinations of the nitrogen abundance and a consistent relation between nitrogen and oxygen abundances for a sample of Seyfert 2 galaxies located at redshift $z <
Optical and mid-infrared neon abundance determinations in star-forming regions
We employed observational spectroscopic data of star-forming regions compiled from the literature and photoionization models to analyse the neon ionic abundances obtained using both optical and
Molecular hydrogen and [Fe ii] in active galactic nuclei — II. Results for Seyfert 2 galaxies
Near-infrared spectroscopy is used to study the kinematics and excitation mechanisms of H2 and [Fe II] lines in a sample dominated by Seyfert 2 galaxies. The spectra simultaneously cover the JHK
Extended gas in Seyfert galaxies: near-infrared observations of 15 active nuclei
ABSTRA C T Results from an analysis of low-resolution OR , 250U near-infrared long-slit spectra covering simultaneously the I, J, H and K bands, for a sample of 15 Seyfert galaxies and the NGC 5253
Neon and Oxygen Abundances in M33
We present new spectroscopic observations of 13 H II regions in the Local Group spiral galaxy M33. The regions observed range from 1 to 7 kpc in distance from the nucleus. Of the 13 H II regions
The M33 Metallicity Project: Resolving the Abundance Gradient Discrepancies in M33*
We present a new determination of the metallicity gradient in M33, based on Keck LRIS measurements of oxygen abundances using the temperature-sensitive emission line [O III] λ4363 in 61 H II regions.
Precision abundance analysis of bright H ii galaxies
We present high signal-to-noise ratio spectrophotometric observations of seven luminous H ii galaxies. The observations have been made with the use of a double-arm spectrograph which provides spectra
Effective temperature of ionizing stars in extragalactic H iiregions – II. Nebular parameter relationships based on CALIFA data
We calculate the effective temperature ($T_{\rm eff}$) of ionizing star(s), oxygen abundance of the gas phase $(\rm O/H)$, and the ionization parameter $U$ for a sample of H\,{\sc ii} regions located
Physical Conditions of the Coronal Line Region in Seyfert Galaxies
The launch of the Infrared Space Observatory and new atomic data have opened a window for the study of high-ionization gas in active galactic nuclei (AGNs). We present the results of a large number
A bayesian-like approach to derive chemical abundances in type-2 active galactic nuclei based on photoionization models
We present a new methodology for the analysis of the emission lines of the interstellar medium in the narrow-line regions around type-2 active galactic nuclei. Our aim is to provide a recipe that