Normalized integrated intensity profiles of the CO J = 3–2 (solid red curve) and HCO⁺ J = 4–3 (solid blue curve) lines along the direction of the exciting star at the PDR (left) and dense core positions (right), averaged over 1″ in the δy direction (see right panel in Fig. 4). The emission from other species such as DCO⁺ J = 2–1 (orange curve; Pety et al. 2007), Hα (black curve; Pound et al. 2003), H₂ 2.12 µm (green curve; Habart et al. 2005), and PAH 8 µm (purple curve; Schirmer et al. 2020) are also included. The spatial resolution of the observations is plotted in the top right corner. The dotted red and blue lines display the ±1σ significance levels for CO and HCO⁺, respectively, corresponding to the standard deviation of the average in the δy direction.