Top row: superposition of the four cuts perpendicular to the Orion Bar described in Sect. 4.1 on the [FeII] 1.64 µmand H₂ 2.12 µm continuum subtracted emission line maps. Cuts 1, 2, 3, and 4 are positioned from left to right. The square areas are used to compute the line intensities in the key regions presented in Table 1. Second and third rows: H₂ (blue), Brγ (red) and [FeII] (green) line intensity (in erg s⁻¹ cm⁻² sr⁻¹) profiles shown as a function of the distance from the IF for each cut along with the HCO⁺ line integrated intensity profile (in K km s⁻¹, grey). The intensity profiles of the Brγ and [FeII] lines have been scaled by the factors indicated in the legends. The line intensities have not been corrected for dust extinction. Bottom row: Averaged emission cut calculated by taking the mean over the entire FoV and perpendicular to the Orion Bar. The vertical dashed lines indicate the average position of the IF, DF, and HCO⁺ peaks.