Fig. A.1.
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a) N2H+(1–0) spectrum averaged over the G11P1-HFS region (see the larger circle in Fig. 3). The seven hyperfine components are labeled. The shaded region shows the central peak with VLSR ranging from 25 to 32 km s−1, which is used for the gas kinematics study (Sec. 3.2). b) Dendrogram tree of N2H+(1–0) emission. The leaves and branches are marked (see also Fig. 3).
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