N₂H⁺ velocity-integrated intensity over all the hfs transitions. The leaf structures identified by the Dendrogram algorithm are shown in black contours, and schematic structures of the extracted cores computed from the intensity-weighted second moment (e.g., variance) of intensities in the plane of the sky are marked as blue ellipses. The white contours are 3σ_rms (0.146 Jy beam⁻¹ km s⁻¹) of the intensity map integrated over a velocity range of 18 km s⁻¹ . All the identified cores are labeled the same as in Table 3. The synthesized beam size for N₂H⁺ emission is displayed in the lower left corner.