Fig. 1
DCO+ observations (histogram) and fit (red line) for J:1–0 (bottom line), J:2–1 (middle line), and J:3–2 (top line) across L183 main PSC. Offsets are indicated for the J:1–0 transition and apply to all. The cut, though sparcely sampled for the J:2–1 and J:3–2 lines, is along the same N2H+ cut as in Paper I and crosses the dust peak.
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