G. F. Hagele

Astrophysics of Galaxies

Identifying AGNs from X-ray detections-I: Metallicity calibrations in AGNs with X-ray luminosity as the primary input parameter

mark-armah

• Mar 1, 2026 • 1 min read

Galaxies: Abundances

Metallicity of active galactic nuclei from ultraviolet and optical emission lines ─ II. Revisiting the C43 metallicity calibration and its implications

o.~l.-dors

• Oct 1, 2025 • 1 min read

ISM: Abundances

Chemical abundances in Seyfert galaxies - X. Sulphur abundance estimates

oli-l.-dors

• May 1, 2023 • 1 min read

ISM: Abundances

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

mark-armah

• Nov 1, 2021 • 1 min read

Galaxies: Abundances

Chemical abundances in Seyfert galaxies - V. The discovery of shocked emission outside the AGN ionization axis

r.~a.-riffel

• Feb 1, 2021 • 1 min read

Galaxy: Evolution

Chemical abundances of Seyfert 2 AGNs - III. Reducing the oxygen abundance discrepancy

o.~l.-dors

• Aug 1, 2020 • 1 min read

Galaxies: Abundances

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

s.~p.-carvalho

• Mar 1, 2020 • 1 min read

Galaxies: Abundances

Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS

o.~l.-dors

• Feb 1, 2020 • 1 min read