P-V diagrams of B59 in ¹²CO (top panels), ¹³CO (centre) and C¹⁸O (lower panels). Each column is the P-V cut as labeled at the top and as shown in Fig. 10. The position of some of the outflows are indicated with blue and red dashed lines and cavities are also indicated. The contours are from 1 K with steps of 1 K for ¹²CO, from 0.3 K with steps of 0.6 K for ¹³CO and from 0.25 K with steps of 0.3 K for C¹⁸O (in ).