Fig. 2.
Azimuth-velocity dispersion diagrams of atomic gas at selected radii in M 33. Each point corresponds to an individual measurement, i.e., the dispersion of each pixel within the map. Solid lines represent the results of a Fourier Transform model of the HI dispersion map (Sect. 3, assuming a cold neutral medium case). The dispersions are from the VLA 100 pc resolution data.
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