The ionized gas in nearby galaxies as traced by the [NII] 122 and 205 μm transitions
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Peer-reviewed
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Abstract
The [NII] 122 and 205 \mu m transitions are powerful tracers of the ionized
gas in the interstellar medium. By combining data from 21 galaxies selected
from the Herschel KINGFISH and Beyond the Peak surveys, we have compiled 141
spatially resolved regions with a typical size of ~1 kiloparsec, with
observations of both [NII] far-infrared lines. We measure [NII] 122/205 line
ratios in the ~0.6-6 range, which corresponds to electron gas densities
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1538-4357
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Science and Technology Facilities Council (ST/M001334/1)