Map of the non-thermal velocity dispersion (σnth, left panel) and ratio between non-thermal and thermal contribution to the observed velocity dispersion (σnth/σth, right panel). In the left panel, the contour levels (dotted contours) range from 0.2 to 0.6 km s-1, in steps of 0.1 km s-1, while in the right panel they range from 1 to 6, in steps of 1. Crosses and solid contours indicate the millimetre continuum cores and the N2D+ cores, respectively, as in Figs. 3 and 1.
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