Solid lines show spectra of C18O (2−1) (green) from the IRAM 30-m telescope averaged over the 12′′ regions (see Table 1), and the dashed green lines show the best single component Gaussian fits to the data. The fit parameters are summarised in Table 3. The red vertical line indicates the velocity centroid from the fits to the PdBI+MOPRA N2H+ (1−0) data.
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