Same as Fig. A.3 for HC¹⁵N(1–0). For G034-G2, G028-C3, and G034-F2, the line was not detected, and we obtained a column density upper limit, as explained in Sect. 3.1. For G034-F1 we did not have a clear detection, but we have obtained from the Gaussian fit that , we have computed as usual the column density, and we refer to this latter as “tentative detection” (see also Table A.2).