Top: spatial distribution of the 3.3 μma) and 3.4 μmb) integrated intensity as observed by the IRC instrument (color scale). The contours represent the integrated intensity of the H₂ S(3) line at 9.7 μm (linear steps of 1.7 × 10^-7 W m^-2 sr^-1), and the star indicates the position of HD 200775. Middle: comparison of the integrated intensity of the bands at 3.3 and 3.4 μm (color scale) with the spatial distribution of the PAH⁰ and eVSG intensity, respectively (contours steps of 1.7 × 10^-5 W m² sr^-1, starting at 1.7 × 10^-5 W m² sr^-1). Bottom: comparison of the integrated intensity of the 3.3 μm band with that of PAH⁺ and with the ratio I_PAH⁺/I_PAH⁰. In f) the contours are shown in steps of 0.3, with increasing values while approaching the star from the PDR.