Integrated intensity map of N₂H⁺(1–0) towards core 13. The red boxes in the map show the areas where the additional velocity components are present. Left panel: the second velocity component (blue fit) is well separated (by ≃1 km s⁻¹) from the main velocity component (red fit). Right top panel: the second velocity component (red fit)is partially blended with the main velocity component (blue fit, the separation is ≃0.3 km s⁻¹ which corresponds to a linewidth σ = 0.13 km s⁻¹). Bottom right panel shows an example spectrum in which only one velocity component is detected with the best fit shown as the greenline.