PdBI 3 mm of the clumps 1 and 2. The color-scale shows the integrated N₂H⁺(1–0) emission within the velocity interval from 90.5 to 94.5 km s^-1 whereas the red contours present the N₂H⁺(1–0) emission within the velocity interval from 43.8 to 45.6 km s^-1. The white contours show the corresponding 3.2 mm continuum emission contoured from the 3σ level in 2σ steps (1σ = 0.27 mJy beam^-1). The full circle outlines that FWHM of the PdBI primary beam at the given frequency, and a scale-bar is shown as well. The PdBI synthesized beam is presented at the bottom-left. The dotted contours show the 1.2 mm continuum emission contoured in 3σ levels of 30 mJy beam^-1.