Open Access

Fig. B.1

image

N-PDFs of column density derived from the HCO+(1–0), HCN(1–0), HNC(1–0), and N2H+(1–0) assuming optically thin emission for the whole filament. We listed in each panel the mean column density ⟨N⟩, the power-law index s (the optimized fit, solid line).

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