Figure 3
From: Turn on the super-elastic collision nature of coronal mass ejections through low approaching speed

Panel (a–f) show the energy differences for six critical cases, in which the value of ΔEkmin is almost zero. Panel (g) exhibits the five test cases (squares for inelastic and dots for super-elastic) and the critical cases (diamonds) in the (VCME1, ΔVc) space. The dotted line shows the exponential fitting to the open diamonds.