Integrated-intensity map of ¹²CO (3–2) (grayscale image). The blue and red contours represent the blue- and redshifted wing emission integrated over the velocity ranges of [−6, 2] km s⁻¹ and [5.5, 12] km s⁻¹. The HPBW is shown in the bottom left corner in white. The position of V1057 Cyg is marked with a white cross. The yellow line shows the cut used for the position-velocity diagram in Fig. 6. The position angle (PA) of the cut is −17° (east from north).