Investigating the variations in the composition and heating of interacting ICMEs

Interacting coronal mass ejections (CMEs) have been commonly reported during the STEREO era. With interaction of CMEs in heliosphere, it is expected that participating will either merge to form a single interplanetary CME (ICME) or arrive as distinct entities ICMEs at 1 AU. Previous studies focused on situ observations solar wind, i.e., plasma and magnetic field properties understand nature CME–CME its impact. In this study, we examine composition parameters those resulted due two their propagation between Sun Earth. We report events observed 2012, which one led merged structure after interaction, The second event was L1 structures. Our analysis reveals signatures ion charge state enhancements. results improve our understanding different complex structures formed interaction. study compression can occur passage shock associated with following through preceding not also highlight importance comparison wind proton velocity data temperature data, particular, ICME–ICME processes.