Observations and Magnetohydrodynamic Simulation of External Reconnection Resulting in a Failed Filament Eruption

Authors:
Open Access
Publisher website
Google Scholar
Abstract
Failed filament eruptions have been reported previously; however, the responsible physical mechanisms remain debated. Using multiwavelength data from Solar Orbiter and Solar Dynamics Observatory, we analyze a failed filament eruption on 2024 March 19. The filament initially manifested as an extreme-ultraviolet (EUV) filament channel and rose without any enhancement in hard X-ray emission. As it subsequently transitioned from acceleration to deceleration, its main axis developed a Y-shaped kink structure, and the hard X-ray flux peaked during the deceleration phase. Brightenings were detected, spatially corresponding to the opposite polarities where the loops overlying the filament channel were rooted. Reconstructed hard X-ray sources revealed the existence of a coronal source at the leading edge of the erupting structure. After the eruption, the overlying loops were heated, and bright materials were observed moving along them. A data-constrained magnetohydrodynamic simulation further demonstrated that the eruptive flux rope interacted with its overlying loops, with its footpoint drifting into the region where the overlying loops were rooted, strongly confirming that external reconnection with the overlying loops eroded the eruptive flux. We also analyzed the decay index above the flux rope before the eruption and found that the flux rope was in the torus stable domain. We propose a possible scenario in which the eruption is initially driven by kink instability, after which external reconnection with the overlying loops leads to its deceleration and ultimately to the failure of the eruption.
Funding Information
  • MOST ∣ National Key Research and Development Program of China (2021YFA1600500)
  • MOST ∣ National Natural Science Foundation of China (12573054)
  • MOST ∣ National Natural Science Foundation of China (12525305)

This publication has 45 references indexed in Scilit: