Detection of ~0.05 km/s ion-neutral velocity drift in L1544 interpreted as the first observational signature of ambipolar diffusion in a prestellar core.
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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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Probing the ion-neutral drift velocity towards the L1544 prestellar core: Detection of ambipolar diffusion using N$_2$D$^+$ and para-NH$_2$D
Detection of ~0.05 km/s ion-neutral velocity drift in L1544 interpreted as the first observational signature of ambipolar diffusion in a prestellar core.
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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.