Fig. 2

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ALMA, JWST/NIRCam, and Keck images of the Orion Bar PDR. We rotated all images to bring the FUV-illuminating direction from the Trapezium stars into the horizontal direction and from the right. The center of all images is at α(2000) = 5h35m20.50s; δ(2000) = −05∘25′21.4′′. The vertical dashed white line marks the approximate position of the main H2 DFs parallel to the Bar. (a) C2H N = 4–3 and (b) C18O J = 3–2. (c) NIRCam F470M–F480M image, a proxy of the H2 v = 0 S (9) line at 4.69 μm (Habart et al. 2024). Dashed and dotted lines show the position and orientation of the intensity crosscuts A, B (see Fig. 3), and C (the JWST spectroscopy cut, Fig. 7) discussed in the text. (d) [C I] 609 μm. (e) Keck/NIRC2 image around the H2 v = 1–0 S (1) line at 2.2 μm (Habart et al. 2023). (f) NIRCam F335MR–F330M image, a proxy of the AIB emission at 3.3 μm (Habart et al. 2024). An arrow marks the position of protoplanetary disk d203-506. The units “cgs” refer to erg s−1 cm−2 sr−1. We show more details in the combined RGB images in Fig. C.3.
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