Fig. 7
Line intensity variations of three representative lines – Brγ, 2.059 μm He i, and H21−0 S(1) – along the strip line, which is perpendicular to the IF of M 17 SW (outlined in Fig. 5). The zero-point is defined at 18:20:25.136, − 16:11:34.21 (J2000), at the maximum strength of the IF; negative offsets point toward the H ii region, while positive offsets point toward the PDR.
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