Metallicity Calibrations in AGNs: N₂O₂ and N₂S₂ Diagnostics

Mon, 20 Apr 2026 00:00:00 +0000

Standard strong-line diagnostics are often heavily biased by the intense radiation fields of AGNs. This ongoing project focuses on deriving new metallicity calibrations—specifically utilizing the N₂O₂ and N₂S₂ emission line ratios—that remain unaffected by structural nebular variations. By parameterizing models explicitly by intrinsic 2-10 keV X-ray luminosity, these tools lay the groundwork for analyzing high-resolution spectra from next-generation observatories.

Interactive Calibrations

N₂O₂ Simulator Demonstrating the robustness of the [N ii]/[O ii] ratio against X-ray luminosity variations compared to traditional diagnostics.

N₂S₂ Simulator Illustrating the volume-canceling properties of the [N ii]/[S ii] ratio and its independence from electron density fluctuations.

Interactive Modeling |

Metallicity Calibrations in AGNs: N₂O₂ and N₂S₂ Diagnostics

Interactive Calibrations