An Insight into the Coupling of CME Kinematics in Inner and Outer Corona and the Imprint of Source Regions

TL;DR

This study investigates how CME kinematics evolve from the inner to outer corona and how source regions influence their dynamics, revealing distinct behaviors linked to different source types and emphasizing the inner corona's role.

Contribution

It provides a detailed statistical analysis of CME kinematic parameters across different source regions and coronal heights, highlighting the influence of the inner corona on CME behavior.

Findings

Kinematic parameters change significantly from inner to outer corona.

Inner corona parameters strongly influence outer corona kinematics.

Source regions imprint distinct statistical correlations on CME dynamics.

Abstract

Despite studying Coronal Mass Ejections (CMEs) for several years, we are yet to have a complete understanding of their kinematics. In this regard, the change in kinematics of the CMEs, as they travel from the inner corona ($<$ 3R$_\odot)$ to the higher heights is essential. We do a follow up statistical study of several 3D kinematic parameters of 59 CMEs studied by Majumdar et al. (2020). The source regions of these CMEs are identified and classified as Active Regions (ARs), Active Prominences (APs), and Prominence Eruptions (PEs). We study several statistical correlations between different kinematic parameters of the CMEs. We show that the average kinematic parameters change as they propagate from the inner to the outer corona, indicating the importance of the region where normally the common practice is to perform averaging. We also find that the parameters in the outer corona is highly influenced by those in the inner corona, thus indicating the importance of inner corona in the understanding of the kinematics. We further find that the source regions of the CMEs tend to have a distinct imprint on the statistical correlations between different kinematic parameters, and that an overall correlation tends to wash away this crucial information. The results of this work lends support towards possibly different dynamical classes for the CMEs from active regions and prominences which is manifested in their kinematics.