Left: N₂H⁺(1–0) contours over 70 μm emission. The color-scale is again chosen to highlight the most important features. The N₂H⁺ emission is integrated from 91 to 106 km s^-1, and contours start at 0.6 and continue in 1 K km s^-1 levels. Right: N₂H⁺(1–0) and 1.2 mm emission. The color-scale shows the N₂H⁺ emission integrated from 49 to 53 km s^-1 and the black contours present the N₂H⁺ emission integrated from 91 to 106 km s^-1. The contours start at 0.6 and continue in 1 K km s^-1 levels. The red 1.2 mm emission is contoured in 3σ levels of 30 mJy beam^-1. Scale-bars are shown at the bottom-left of each panel.