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Fig. E.2

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Map of the line ratio between the HC3N (10 − 9) and (8 − 7) transitions. White dashed contours correspond to the filaments identified in NH3 emission by P15 and S21. The black star marks the position of the protostar B5-IRS1. Inset: KDE of the line ratios obtained. The dashed vertical line shows the median value of the distribution, and the uncertainties correspond to the distance to the 1st and 3rd quartiles.

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