Eruption of Solar Magnetic Flux Ropes Caused by Flux feeding
Abstract
Large scale solar eruptions are believed to be related with magnetic flux ropes. However, the cause of their eruption remains elusive. Recent observations found that a prominence erupted in the wake of multiple episodes of "flux feeding". During each episode, a chromospheric fibril rose upward and merged with the above prominence. In this paper, we investigate the physical essence of this flux feeding mechanism. We carry out 2.5-dimensional magnetohydrodynamic ( MHD ) numerical simulations to investigate the effect of flux feeding on flux rope systems. The simulations demonstrate that flux feeding can initiate eruptions by feeding axial flux into the flux rope until its total axial flux reaches a critical value, while its poloidal flux remains unchanged. We reach similar conclusions when inhibiting magnetic reconnection in the vertical current sheet formed beneath the flux rope, which indicates that an ideal process dominates the onset of the eruption. Our simulation results corroborates that flux feeding is a promising mechanism to cause the eruption of solar magnetic flux ropes.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMSH33B3378Z
- Keywords:
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- 7509 Corona;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7513 Coronal mass ejections;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7524 Magnetic fields;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7959 Models;
- SPACE WEATHER