Map of the peak velocity of the NH3 (1, 1) (left panel) and (2, 2) (right panel) inversion transitions fitted as outlined in Sect. 3.1. Crosses indicate the emission peaks of cores C1-a, C1-b, C2, C3, and A2 (see Fig. 1). Solid contours mark the location of the N2D+ cores, (see Fig. 1). In both panels, the dotted contours range from − 19.5 to − 16.5 km s-1, in steps of 0.3 km s-1, and the ellipse in the bottom left corner shows the VLA synthesised beam.
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