Physical scales involved in the fragmentation process. The x-axis is the cloud radius, and the y-axis denotes the critical length scales involved in the fragmentation process. The blue dashed line stands for the Toomre length l_Toomre = 2πGΣ /κ². In the blue shaded region fragmentation is suppressed due to shear. The red solid line stands for the Jeans length where we have chosen σ_v = 1km s^-1. In red shaded region fragmentation is suppressed due to thermal-turbulent support. The clumps 4 and 7 form a pair at a cloud radius of 13.5 pc, and they are separated by 10 pc. It is indicated in this diagram as the red square, where the size of the square represents the estimated uncertainty.Since we did not de-project the clump separation into 3D, and the cloud is inclined with an angle of 45°, we estimate an uncertainty of (see text for details). The central 5 pc is dominated by the central clump (measured from from Fig. C.1), where we do not expect our analysis to apply. This is indicated by the vertical red dashed line.