Distribution of different physical parameters along the filament spine (see the orange line in Fig. 5). These physical quantities are the averaged values within a beam (46″) at the blue points in the top-left panel of Fig. C.1. Panels a and b: distribution of the gravitational potential and λ_min (see Sect. 7) along the spine of the filament, respectively. Panels c and d: Herschel dust temperature and H₂ column density (blue) and the H₂ column density derived from ¹³CO (1–0) (green). Panels e and f: distributions of the center velocity and line width obtained by fitting ¹³CO (1–0). Their errors arise from the Gaussian fitting process. Panel g: YSO area density: total YSOs (black), Class I (red), flat spectrum (orange), Class II (green), and Class III (blue). The vertical dashed red lines mark the positions of clumps. Panel h: schematic diagram of the core formation model, which is explained in Sect. 4.1.3. Panel h: density profile along the projected filament (ρ) and velocity profile along the projected filament (V_LSR). The two sets of velocity profiles in the bottom panel indicate two different scenarios. The dashed green line represents the velocity profile generated under the condition that the two clumps’ centroids are at rest relative to each other while accreting material along the filament. The solid line (composed of two segments, in red and blue) represents the velocity profile generated under the condition that the two clumps are moving toward each other while also accreting material along the filament. Red and blue curves represent redshift and blueshift clumps, respectively.