Speaker
Description
Coronal mass ejections (CMEs) are the main drivers of particle acceleration in the heliosphere, leading to geoeffective events in the Earth's environment.
Observations showing the buildup of CMEs reveal that the start of CME is the existence of a flux rope with a cool filament or not near the solar surface. Instability like torus or kink instability leads to the rise of the flux rope in the corona; according to the magnetic field configuration of the corona the flux rope can be in jail under a magnetic cage, this is the case for confined eruptions or continue to rise in open magnetic lines and travel in the heliosphere if its magnetic energy is large enough compared to gravity force. This latter case corresponds to eruptive events and possibly leads to geomagnetic events when it does not encounter any disturbance in the solar wind. The role of the null point will be discussed in such a configuration.
Observations and data-driven 3D MHD models constrained by the observations will be presented for these two different cases.
| Do you plan to attend in-person or online? | In-person |
|---|
