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Fig. 3
Representative N2H+ (1–0) (blue) and N2H+ (7–6) (red) spectra (in Tmb units) found in the OMC-1 Ridge (a), the surroundings of the Orion BN/KL region (b), and the OMC-1 South proto-cluster (c). The coordinates of our spectra are indicated in the upper left corner of each subplot (see also Fig. 2a).
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