Fig. 4
Top: maps of the 13CO(J = 1−0) field moments in the cloud’s frame of reference. Bottom: maps of the physical quantities directly derived from each field, with the centroid velocity being simply W1/W0, and the Full Width at Half Maximum (FWHM) velocity dispersion given by 
– the normalization of the FWHM corresponds to that of a field with purely Gaussian line profiles.
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