Name: Wageesh Mishra
Affiliation: Indian Institute of Astrophysics, Bengaluru
Conference ID : ASI2022_407
Title : Investigating the interaction of CMEs during their heliospheric propagation
Authors : Mishra, Wageesh; Wang, Yuming; and Srivastava, Nandita
Abstract Type: Poster
Abstract Category : Sun and the Solar System
Abstract : The kinematics of coronal mass ejections (CMEs) can change when they interact or collide with each other as they propagate in the heliosphere. The knowledge about the nature of the collision of CMEs can be utilized to predict their post-collision kinematics and relatively accurate arrival time at the Earth. In the present study, we selected eight cases of interacting CMEs and estimated their propagation and expansion speeds, and direction of impact and masses, by exploiting coronagraphic and heliospheric imaging observations. Although the sample size is small, we find good dependence of the nature of collision on the CME parameters. The derived CMEs parameters could have large uncertainties, and therefore we have thoroughly discussed the uncertainties involved in the calculation of the coefficient of restitution. We highlight the significance of heliospheric imaging (HI) observations in studying CME-CME collision for improved space weather forecasting.