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Fig. 4


Spatial distribution of the observed [NII] 205 μm line. a) continuum-removed coadded spectrum on every pixel within a range of 1452 <ν< 1467 GHz. The vertical axis in each pixel ranges between −1.7 × 10-17 and 9.3 × 10-17 W m-2 sr-1 Hz-1. b) measured [NII] 205 μm intensity distribution, in the unit of W m-2 sr-1, within the mapped region of M 83. Each pixel has size 15′′ × 15′′ or 330 pc × 330 pc. The spatial resolution of the map is 17′′.

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