$\mathrm{N_2O_2}$ Diagnostic: Total Parameter Immunity

Demonstrating that the $\mathrm{N_2O_2}$ ratio is a “clean” metallicity indicator, unaffected by both X-ray luminosity (L_{\mathrm{X}}) and electron density (N_{\mathrm{e}}) in the low-density limit.

$\mathrm{LOG}\ L_{\mathrm{X}}$
42.0
${\mathrm{N_2O_2\ RATIO}}$
-0.34
AGN SOURCE
»»
$\mathrm{H}^{+},\ \mathrm{O}^{2+}$ $\bullet\ \mathrm{PIZ:}\ \mathrm{N}^{+}\ \&\ \mathrm{O}^{+}\ \mathrm{Zone}$
$[\mathrm{N\,\scriptstyle{II}}]\ \lambda\lambda 6548, 6584$ Intensity
150
$[\mathrm{O\,\scriptstyle{II}}]\ \lambda\lambda 3726, 3729$ Intensity
330
42.0
$\mathrm{METALLICITY}\ (Z/Z_{\odot})$
0.5
1.0
2.0
$\mathrm{DENSITY}\ (N_{\mathrm{e}})$
100
1000
5000