Coherent cores and their immediate neighbourhood, as defined in Sect. 4.4, shown in the velocity dispersion map. The coherent cores, and the shell-1 and shell-2 regions are shown with blue, red, and green contours, respectively.The white dashed contour shows the boundary considered for continuum cores Oph-B1 and Oph-B2 (see Sect. 4.4 for details). The white stars show the positions of Class 0/I and flat-spectrum protostars in the cloud. The beam and the scale bar are shown in the bottom left and bottom right corners, respectively.