Figure 4
From: Turn on the super-elastic collision nature of coronal mass ejections through low approaching speed
Panel (a) shows how ΔVc varies with VCME1. The different colors indicate different values of the k-number of the first CME. The dashed lines are the quadratic fittings. Panel (b) shows how ΔVc varies with the k-number of the first CME. The different colors indicate different value of VCME1. The dashed lines are the linear fittings. Panel (c) presents the correlation between the critical approaching speeds and their fitting values. The shadow region denotes the 3-sigma uncertainty. It is super-elastic below the shadow region and inelastic above the shadow region. Panel (d) shows the surface of the critical approaching speed in the (VCME1, k) space. Previously studied events are marked by color-coded symbols in Panel (c,d). The dot for super-elastic and the squares for inelastic. The filled symbol means that the event is in agreement with the diagram (Panel d) derived from our numerical experiments and the open symbol means a more or less disagreement.
