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    • Metallicity Calibrations in AGNs: N2O2 and N2S2 Diagnostics
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    • Identifying AGNs from X-ray detections-I: Metallicity calibrations in AGNs with X-ray luminosity as the primary input parameter
    • Metallicity of active galactic nuclei from ultraviolet and optical emission lines ─ II. Revisiting the C43 metallicity calibration and its implications
    • Spatially resolved gas-phase metallicity in Seyfert galaxies
    • Chemical abundances in Seyfert galaxies - X. Sulphur abundance estimates
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    • Gas-phase metallicity determinations in nearby AGNs with SDSS-IV MaNGA: evidence of metal-poor accretion
    • Chemical abundances in Seyfert galaxies - VII. Direct abundance determination of neon based on optical and infrared emission lines
    • Chemical abundances in Seyfert galaxies - V. The discovery of shocked emission outside the AGN ionization axis
    • Chemical abundances of Seyfert 2 AGNs - III. Reducing the oxygen abundance discrepancy
    • Chemical abundances of Seyfert 2 AGNs - II. N2 metallicity calibration based on SDSS
    • Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS
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    • Metallicity Calibrations in AGNs: N₂O₂ and N₂S₂ Diagnostics
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Identifying AGNs from X-ray detections-I: Metallicity calibrations in AGNs with X-ray luminosity as the primary input parameter

Mar 1, 2026·
Mark Armah
,
O.~L. Dors
,
Rogério Riffel
,
M.~V. Cardaci
,
G.~F. Hägele
,
Rogemar A. Riffel
,
J.~M. Vı́lchez
· 0 min read
arXiv DOI
publication
Last updated on Mar 1, 2026
Astrophysics of Galaxies
Metallicity of active galactic nuclei from ultraviolet and optical emission lines ─ II. Revisiting the C43 metallicity calibration and its implications Oct 1, 2025 →

© 2026 Mark Armah. This work is licensed under CC BY NC ND 4.0

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