New NIR diagnostic diagrams using [C I]/Paγ and H2 1-0 O(5)/PAH 3.3μm ratios correlate with radiation field hardness and distinguish star formation, AGN, and shock excitation in galaxy nuclei.
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Close dual-AGN systems exhibit increased obscuration, higher bolometric luminosity, and elevated Eddington ratios for the less massive black hole as projected separation decreases, with excess AGN pairs relative to controls.
Cosmic rays heat inner gas clouds in NGC 5728 and boost low-ionization optical and certain mid-IR lines while high-ionization lines remain insensitive, enabling multi-wavelength separation of CR, shock, and metallicity effects.
High CR ionization rates (above 10^-13 s^-1) in AGN and starburst models produce enhanced low-ionization emission that matches observations without super-solar metallicities and suggests revised BPT diagram boundaries.
citing papers explorer
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Near-infrared diagnostic diagrams of the gas ionization sources in nearby galaxies: a JWST NIRSpec view
New NIR diagnostic diagrams using [C I]/Paγ and H2 1-0 O(5)/PAH 3.3μm ratios correlate with radiation field hardness and distinguish star formation, AGN, and shock excitation in galaxy nuclei.
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Enhanced activity in close dual-AGN systems in the local Universe
Close dual-AGN systems exhibit increased obscuration, higher bolometric luminosity, and elevated Eddington ratios for the less massive black hole as projected separation decreases, with excess AGN pairs relative to controls.
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Cosmic-ray impact on optical and mid-infrared emission line diagnostics in NGC 5728
Cosmic rays heat inner gas clouds in NGC 5728 and boost low-ionization optical and certain mid-IR lines while high-ionization lines remain insensitive, enabling multi-wavelength separation of CR, shock, and metallicity effects.
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Cosmic Ray Ionization of Low-Excitation Lines in Active Galactic Nuclei and Starburst Galaxies
High CR ionization rates (above 10^-13 s^-1) in AGN and starburst models produce enhanced low-ionization emission that matches observations without super-solar metallicities and suggests revised BPT diagram boundaries.