Direct First Parker Solar Probe Observation of the Interaction of Two Successive Interplanetary Coronal Mass Ejections in 2020 November

Abstract We investigate the effects of evolutionary processes in internal magnetic structure two interplanetary coronal mass ejections (ICMEs) detected situ between 2020 November 29 and December 1 by Parker Solar Probe (PSP). The sources ICMEs were observed remotely at Sun EUV subsequently tracked to their counterparts white light. This period is particular interest community as it has been identified first widespread solar energetic particle event cycle 25. distribution various heliospheric-dedicated spacecraft throughout inner heliosphere during PSP observations these large-scale structures enables a comprehensive analysis evolution topology such structures. By assembling different models techniques, we identify signatures interaction consecutive implications for structure. use multispacecraft combination with remote-sensing forward modeling technique, numerical propagation models, reconstruction techniques. outcome, from full reconciliations, demonstrates that (CMEs) are interacting vicinity PSP. Thus, based on physical associated collision both CMEs. also expand flux rope technique incorporate aging expansion distorted explore configuration ICMEs.