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Fig. 2.


Line profiles toward the Orion Bar (DF position). Left: H41α with Δv ≃ 26 km s−1 and vLSR ≃ −4 km s−1, and [13C II] (intensity divided by 30) with Δv ≃ 2.6 km s−1 (the [12C II] emission has been blanked out). Right: CO+N, F = 2, 5/2 – 1, 3/2 and C41α lines with Δv ≃ 2.6 km s−1. Dashed lines indicate the LSR velocity, 10.7 km s−1, of the PDR.

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