Fig. C.2

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Spatial distribution of the surface brightnesses of the 6.2, 7.7, 8.6, 11.0, and 11.2 μm AIBs in the Orion Bar PDR, in units of Wm−2 sr−1, and brightness ratios relative to the 11.2 μm AIB. Here, maps of the 7.7 and 8.6 μm AIBs measured using both the local and global continua (Fig. 1) are presented for comparison. θ1 Ori C is located toward the top right of each map. For each map, the range of the corresponding color bar is set between 0.5% and 99.5% percentile level for the data, while zero pixels, edge pixels, and pixels covering the two proplyds as seen in the MIRI mosaic, indicated by the black circles, are masked out. The contours trace peak emission for the 11.0 μm AIB (white), the 11.2 μm AIB (teal). The rectangular apertures of the template spectra for the H ii region, atomic PDR, DF 1, DF 2, and DF 3, from top to bottom, are shown in gray, the gray lines delineate the IF and the three DFs, DF 1, DF 2, and DF 3, and the dashed, diagonal white line in the top left map indicates the cut across the MIRI mosaic (position angle of 155.79°).
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