The color-scale shows the 0th, 1st and 2nd moment map of the N₂H⁺(1–0) emission in the velocity regime between 90.5 and 94.5 km s^-1 (corresponding to the integrated intensity, the intensity-weighted peak velocity and the intensity-weighted line-width, respectively). The contours present the 3.2 mm continuum emission contoured from the 3σ level in 2σ steps (1σ = 0.27 mJy beam^-1). The left panel shows a scale-bar, and the PdBI synthesized beam is presented at the bottom-left of each panel. The 0/0 position is the phase center of the PdBI observations at RA (J2000.0) 18:48:02.21 and Dec (J2000.0) –01:53:55.8.