Left: analysis of the AIB emission in NGC 7023 along the Star-NW cut, using the PAHTAT tool (Pilleri et al. 2012). The integrated intensity over the 5.5−14  μm spectral range after correction from extinction (thick black), as well as the contributions from eVSGs (red), neutral PAHs (green), and PAH cations (blue) are shown. The vertical line indicates the position of the PDR front, at 42″ from the star. Right: physical and chemical structure of the NW PDR as computed with the Meudon PDR code, assuming an intensity of the UV radiation field G₀ = 2600 in Habing units at A_V = 0 (42″ from the star), and a constant pressure of 7 × 10⁶ K cm^-3.