Metallicity Calibrations in AGNs: N2O2 and N2S2 Diagnostics

May 15, 2026 · 1 min read
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Add buttons to open the simulators in a full new tab

links:

  • icon: play icon_pack: fas name: Open N2O2 Simulator url: /simulations/N2O2_Clean_Diagnostic.html
  • icon: play icon_pack: fas name: Open N2S2 Simulator url: /simulations/N2S2_Interactive_Pro.html

Here is a live demonstration of how the N2O2 ratio remains unaffected by X-ray luminosity and electron density in the low-density limit:

And here is the interactive model demonstrating how line intensity ratios cancel out volume effects for N2S2:

Authors
Mark Armah (He/Him)
Postdoctoral Fellow
I am an extragalactic astrophysicist specializing in the chemical evolution of Active Galactic Nuclei (AGNs) and Seyfert galaxies. My research addresses a fundamental question in galaxy evolution: how do actively accreting supermassive black holes regulate the chemical and physical properties of their host environments? By bridging the gap between intricate multi-dimensional spectroscopic datasets and advanced theoretical photoionization models, I develop custom computational pipelines to untangle AGN radiation from true gas-phase abundances. Ultimately, my work pioneers robust new metallicity calibrations and diagnostic tools that allow wider applications to decode complex AGN feedback mechanisms.