Confined and eruptive catastrophes of solar magnetic flux ropes caused by mass loading and unloading
arXiv:2108.09401 · doi:10.3847/1538-4357/ac1fef
Abstract
It is widely accepted that coronal magnetic flux ropes are the core structures of large-scale solar eruptive activities, which inflict dramatic impacts on the solar-terrestrial system. Previous studies have demonstrated that varying magnetic properties of a coronal flux rope system could result in a catastrophe of the rope, which may trigger solar eruptive activities. Since the total mass of a flux rope also plays an important role in stabilizing the rope, we use 2.5-dimensional magnetohydrodynamic (MHD) numerical simulations in this letter to investigate how a flux rope evolves as its total mass varies. It is found that an unloading process that decreases the total mass of the rope could result in an upward (eruptive) catastrophe in the flux rope system, during which the rope jumps upward and the magnetic energy is released. This indicates that mass unloading processes could initiate the eruption of the flux rope. Moreover, when the system is not too diffusive, there is also a downward (confined) catastrophe that could be caused by mass loading processes, via which the total mass accumulates. The magnetic energy, however, is increased during the downward catastrophe, indicating that mass loading processes could cause confined activities that may contribute to the storage of energy before the onset of coronal eruptions.
This paper has been accepted by The Astrophysical Journal
References in corpus (17)
- Formation of a Double-decker Magnetic Flux Rope in the Sigmoidal Solar Active Region 11520
- Catastrophe versus instability for the eruption of a toroidal solar magnetic flux rope
- How did a Major Confined Flare Occur in Super Solar Active Region 12192?
- Magnetic Flux Ropes in the Solar Corona: Structure and Evolution toward Eruption
- Magnetohydrodynamic Simulation of the X2.2 Solar Flare on 2011 February 15: II. Dynamics Connecting the Solar Flare and the Coronal Mass Ejection
- A flux emergence model for solar eruptions
- Catastrophic eruption of magnetic flux rope in the corona and solar wind with and without magnetic reconnection
- Triggering mechanism and material transfer of a failed solar filament eruption
- Prominence formation by levitation-condensation at extreme resolutions
- Large-amplitude longitudinal oscillations in a solar filament
- Importance of CME Radial Expansion on the Ability of Slow CMEs to Drive Shocks
- Simulations of prominence eruption preceded with large amplitude longitudinal oscillations and draining
- Modelling the Effect of Mass-Draining on Prominence Eruptions
- Eruption of Solar Magnetic Flux Ropes Caused by Flux Feeding
- Ideal MHD instabilities for coronal mass ejections
- Downward catastrophe of solar magnetic flux ropes
- Influence of photospheric magnetic conditions on the catastrophic behaviors of flux ropes in active regions