Physical and chemical parameters (from top to bottom: position angle of local velocity gradient, magnitude of local velocity gradient, C¹⁸O rotational temperature, C¹⁸O column density, C¹⁸O fractional abundance, dust temperature, H₂ column density, nonthermal velocity dispersion, and velocity centroid) along the crest of the Serpens filament indicated by the blue line in Fig. 2d. The origin of the offsets corresponds to the southern end of the blue line in Fig. 2d. The offset increases from south to north. The positions which are close to the seven 1.1 mm dust cores and the three YSOs are indicated by the cyan and orange vertical lines, respectively. In the two lowest panels, the data derived from C¹⁸O (1–0) and C¹⁸O (2–1) are indicated by blue and red symbols, respectively.