Schematic view of the region of the clump and the typical temperatures traced by different molecules. This represents a clump with the typical properties traced by the different molecules, as observed in this work (cf. Fig. 5). The circles indicate the approximate radius at the median temperature traced by the species marked near to it (cf. Table 6), according to the colourscale. CO appears twice as it traces the outskirts of clumps when the temperature in the inner region is below 25 K, and the bulk of the dense gas when the temperature is above this threshold (see text).
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