(a) Nobeyama C¹⁸O (1–0) centroid velocity map, (b) Nobeyama H¹³CO⁺ (1–0) centroid velocity map (close-up view of panel b in Fig. 4), (c) centroid velocity map of the fragmenting filament model, and (d) NOEMA+45m H¹³ CO⁺ (1–0) centroid velocity map toward the NOEMA observed area indicated by the dashed box in panel b. In panels a and b, a black line indicates the crest of the filament which corresponds to the z-axis in Fig. 8a and r = 0 in Fig. 8b. The back line starts at (RA_J2000, Dec_J2000)=(5^h42^m11^s.823, −2°02^m53^s.97) and ends at (RA_J2000, Dec_J2000)=(5^h41^m45^s.806, −1°59^m23^s.97). See also Fig. A.1.