Velocity dispersion and P-V diagram of W49A-N. Top panel: velocity dispersion of ¹³CO (3–2), shown with the color map, and the velocity contours of −1–4 km s⁻¹ and 9–14 km s⁻¹, shown as blue and red contours, respectively. The white contours represent the strongest positions of the 1420 MHz continuum radiation (the outermost contour corresponds to 60% of the peak intensity). The plus sign indicates the massive YSO reported by De Buizer et al. (2021). The white circle is the position of the collision pointed out by Miyawaki et al. (2022). Bottom panel: P-V diagram along the direction of the black arrow in the top panel.