Is There a Dynamic Difference between Stealthy and Standard Coronal Mass Ejections?

Abstract Stealthy coronal mass ejections (CMEs), lacking low signatures, may result in significant geomagnetic storms. However, the mechanism of stealthy CMEs is still highly debated. In this work, we investigate whether there are differences between and standard terms their dynamic behaviors. Seven eight with speeds selected. We calculate two-dimensional speed distributions based on cross-correlation method, rather than unidimensional speed, further obtain more accurate evolution CME mechanical energies. Then derive driving powers correlate them parameters (total mass, average acceleration) for CMEs. Besides, study forces that drive CMEs, namely, Lorentz force, gravitational drag force due to ambient solar wind near Sun. The results reveal both propelled by combined action those inner corona. comparable force. impact global significantly weaker