Eruption of Solar Magnetic Flux Ropes Caused by Flux Feeding
arXiv:2007.01278 · doi:10.3847/2041-8213/aba1f3
Abstract
Large-scale solar eruptions are believed to have a magnetic flux rope as the core structure. However, it remains elusive as to how the flux rope builds up and what triggers its eruption. Recent observations found that a prominence erupted following multiple episodes of "flux feeding". During each episode, a chromospheric fibril rose and merged with the prominence lying above. In this letter, we carried out 2.5-dimensional magnetohydrodynamic (MHD) numerical simulations to investigate whether the flux-feeding mechanism can explain such an eruption. The simulations demonstrate that the discrete emergence of small flux ropes can initiate eruptions by feeding axial flux into the preexistent flux rope until its total axial flux reaches a critical value. The onset of the eruption is dominated by an ideal MHD process. Our simulation results corroborate that the flux feeding is a viable mechanism to cause the eruption of solar magnetic flux ropes.
This paper has been accepted by ApJL
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Cited by in corpus (4)
- Prominence formation by levitation-condensation at extreme resolutions
- Non-equilibrium Flux Rope Formation by Confined Flares Preceding a Solar Coronal Mass Ejection
- Pre-eruption Splitting of the Double-Decker Structure in a Solar Filament
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