Velocity map of ‘global component’ (left). Velocity map of the four additional components (right). Each of these four components show a very narrow range of velocities. The median velocities of these components are 9.61 km s⁻¹ (far-blue), 9.99 km s⁻¹ (mid-blue), 10.32 km s⁻¹ (mid-red), and 10.58 km s⁻¹ (far-red). The black-solid and black-dashed contours show the two filaments and the three condensations in B5, respectively. The common colour scale is shown in the left panel. The black-dotted contours show the boundary of the coherent core in Pineda et al. (2010). The scale-bar and beam size are shown in the top-right and bottom-left corners, respectively.