Distribution of relative orientation between gravity (g), velocity gradient (v), and intensity gradient (i) vectors. a) Spatial distribution of relative orientation between g and v vectors (in color) overlaid on the N₂H⁺ moment-0 map. b) Histogram distribution of relative orientation between g, v, and i vectors toward circular region marked in panel (a). Black and cyan contours are same as the contours shown in Fig. A.2c, and Fig. A.2e, respectively.