An investigation of CME dynamics, productivity and source-region subsurface structure

This work is to study the dynamics of coronal mass ejections and to investigate possible correlation between CME productivity and subsurface structure. Two CMEs and six active regions are selected for the study. The CMEs are examined by comparing observations and theoretical models, and the subsurface structures are probed by local helioseismic inversions. The analysis of the CMEs shows that the eruptive flux-rope model is in good agreement with both events. However, some discrepancies with the observation are also found, indicating that the model can be further improved. The helioseismic investigation results indicate a consistent correlation between the CME productivity and the subsurface temperature structure. The inferred subsurface magnetic structure reveals that the source regions of the two studied CMEs may share similar subsurface structures. Not found in the other CME productive regions selected for consideration, however, the similarity in the subsurface features may indicate the presence of a subsurface structural connection betweenthe two closely located and CME-productive regions.