Velocity analysis of source AG348.5792–0.9197. (a): First-moment map of YSO source AG348.5792–0.9197 in H₂CO (3_0, 3–2_0, 2). The position of the continuum peak flux density is shown by the green star, and continuum contours are shown in black (levels 3, 6, 9σ_cont). The red line indicates the axis along which the PV cut was taken. (b): PV cut with 3 and 5σ_line contours in white, and the v_lsr of the region shown by the white dashed line. The orange points show the nearest pixels at the 3σ_line contours. The red boxes are examples of the areas where we estimate the flow rates across (∼1″). The peak flux density position of the continuum core is located at the centre of each axis.