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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PHANGS-Hα provides new narrow-band Hα imaging and derived star formation products for 65 nearby galaxies, validated against MUSE spectroscopy and serving as calibration reference for the PHANGS collaboration.
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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The PHANGS-H{\alpha} survey. Ground-based narrow-band imaging of nearby star-forming galaxies
PHANGS-Hα provides new narrow-band Hα imaging and derived star formation products for 65 nearby galaxies, validated against MUSE spectroscopy and serving as calibration reference for the PHANGS collaboration.
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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.