Is there a Dynamic Difference between Stealthy and Standard CMEs?
arXiv:2211.12825 · doi:10.3847/1538-4357/aca52c
Abstract
Stealthy Coronal Mass Ejections (CMEs), lacking low coronal 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 the stealthy and standard CMEs in terms of their dynamic behaviors. Seven stealthy and eight standard CMEs with slow speeds are selected. We calculate two-dimensional speed distributions of CMEs based on the cross-correlation method, rather than the unidimensional speed, and further obtain more accurate distributions and evolution of CME mechanical energies. Then we derive the CME driving powers and correlate them with CME parameters (total mass, average speed, and acceleration) for standard and stealthy CMEs. Besides, we study the forces that drive CMEs, namely, the Lorentz force, gravitational force, and drag force due to the ambient solar wind near the Sun. The results reveal that both the standard and stealthy CMEs are propelled by the combined action of those forces in the inner corona. The drag force and gravitational force are comparable with the Lorentz force. However, the impact of the drag and Lorentz forces on the global evolution of the stealthy CMEs is significantly weaker than that of the standard CMEs.
arXiv comment14 pages, 7 figures, 1 table. Accepted by ApJ
References in corpus (25)
- Torus instability
- Comprehensive Analysis of Coronal Mass Ejection Mass and Energy Properties Over a Full Solar Cycle
- Multi-scale Gaussian normalization for solar image processing
- No Trace Left Behind: Stereo Observation of a Coronal Mass Ejection without Low Coronal Signatures
- Metis: the Solar Orbiter visible light and ultraviolet coronal imager
- Propagation of an Earth-directed coronal mass ejection in three dimensions
- What can we learn about solar coronal mass ejections, coronal dimmings, and Extreme-Ultraviolet jets through spectroscopic observations?
- A model for stealth coronal mass ejections
- Observational Characteristics of CMEs without Low Coronal Signatures
- CME dynamics using STEREO & LASCO observations: the relative importance of Lorentz forces and solar wind drag
- Can solar wind viscous drag account for CME deceleration?
- Energetics of solar coronal mass ejections
- Quasi-Periodic Releases of Streamer Blobs and Velocity Variability of the Slow Solar Wind near the Sun
- Low polarized emission from the core of coronal mass ejections
- Modeling the thermodynamic evolution of Coronal Mass Ejections (CMEs) using their kinematics
- Why does the apparent mass of a coronal mass ejection increase?
- Coronal Mass Ejection Mass, Energy, and Force Estimates Using STEREO
- Solar origins of a strong stealth CME detected by Solar Orbiter
- Stealth Coronal Mass Ejections from Active Regions
- First Determination of 2D Speed Distribution within the Bodies of Coronal Mass Ejections with Cross-Correlation Analysis
- Investigating Remote-sensing Techniques to Reveal Stealth Coronal Mass Ejections
- Determining the source and eruption dynamics of a stealth CME using NLFFF modelling and MHD simulations
- Combining White Light and UV Lyman-alpha Coronagraphic Images to determine the Solar Wind Speed: the Quick Inversion Method
- Interaction of coronal mass ejections and the solar wind. A force analysis
- Predicting the Magnetic Fields of a Stealth CME Detected by Parker Solar Probe at 0.5 AU