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Fig. 3

image

HI velocity field (in km s-1) at 21 cm of the M 33 galaxy (from Chemin et al. 2012). The color of each pixel shows the line-of-sight velocity with the color scale indicated in the right part of the panel. The M 33 ellipse with a semi-major axis equal to 48′ and a semi-minor axis of 28′ (60% larger than that in Fig. 1) is also shown.

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