Blueshifted and redshifted NH₃ (1, 1) integrated-intensity contours overlaid on a 3.5 mm continuum. The blue and red contours are the blueshifted and redshifted velocity components, respectively. The blue contour levels start at − 3σ in steps of 3σ for NH₃ (1, 1) with σ = 7.2 mJy beam⁻¹km s⁻¹, and the red ones with σ = 4.8 mJy beam⁻¹km s⁻¹. The black numbers indicate the positions of extracted NH₂D cores. The synthesized beam sizes are indicated at the bottom-left corner. The dashed circle indicates the primary beam of the PdBI observations at 3.5 mm. The lines with arrows show the position-velocity cutting direction in Fig. 8. Other sources are presented in Fig. A.7.