Ratio of CN to HCN column densities obtained with RADEX for n_H = 10⁵ cm⁻³ and T_kin = 50 K for a range of line intensity ratios (orange line). The observed line intensity ratio is shown as a rectangle: light green correspondsto the values observed at the protostar position, blue to the outflow positions, and dark green to both regions. Column density ranges are indicated by black and navy dashed lines for protostars and outflow positions, respectively.