(a) Nobeyama 45m H¹³CO⁺ (1–0) integrated intensity, (b) H¹³CO⁺ (1–0) centroid velocity map, (c) NOEMA, and (d) NOEMA+45m H¹³CO⁺ (1–0) integrated intensity maps. The integrated velocity range is from 10.21 km s⁻¹ to 11.96 km s⁻¹. In panels a and b, black polygons outline the field observed in the H¹³CO⁺ (1–0) line. In panel a, the red box indicates the area shown in panels c and d. In panel b, the dashed red box indicates the area shown in Fig. 7. The white open circles in panels c and d indicate the positions of the cores identified in the Herschel map via the dendrogram analysis. The sizes of the white open circles reflect the Herschel source sizes. The small blue open circles in panels c and d mark the positions of the cores identified in the NOEMA H¹³CO⁺ map via the dendrogram analysis with a fixed symbol size. The filled circles at the bottom right indicate the beam sizes in panels a and b. See also Fig. A.1.