Three-dimensional Turbulent Reconnection within Solar Flare Current Sheet

Abstract

Solar flares can release coronal magnetic energy explosively and may impact the safety of near-earth space environments. Their structures and properties on macroscale have been interpreted successfully by the generally-accepted two-dimension standard model invoking magnetic reconnection theory as the key energy conversion mechanism. Nevertheless, some momentous dynamical features as discovered by recent high-resolution observations remain elusive. Here, we report a self-consistent high-resolution three-dimension magnetohydrodynamical simulation of turbulent magnetic reconnection within a flare current sheet. It is found that fragmented current patches of different scales are spontaneously generated with a well-developed turbulence spectrum at the current sheet, as well as at the flare loop-top region. The close coupling of tearing-mode and Kelvin-Helmholtz instabilities plays a critical role in developing turbulent reconnection and in forming dynamical structures with synthetic observables in good agreement with realistic observations. The sophisticated modeling makes a paradigm shift from the traditional to three-dimension turbulent reconnection model unifying flare dynamical structures of different scales.

15 pages, 8 figure, accepted for publication in ApJL

References in corpus (20)

• Instability of current sheets and formation of plasmoid chains
• The Athena++ Adaptive Mesh Refinement Framework: Design and Magnetohydrodynamic Solvers
• Numerical Tests of Fast Reconnection in Weakly Stochastic Magnetic Fields
• Highly Efficient Modeling of Dynamic Coronal Loops
• CHIANTI - an atomic database for emission lines - Paper XV: Version 9, improvements for the X-ray satellite lines
• Reconnection-Driven Energy Cascade in Magnetohydrodynamic Turbulence
• The Origin of Underdense Plasma Downflows Associated with Magnetic Reconnection in Solar Flares
• The Power-Law Distribution of Flare Kernels and Fractal Current Sheets in a Solar Flare
• Observational Evidence of Particle Acceleration Associated with Plasmoid Motions
• MHD turbulence formation in solar flares: 3D simulation and synthetic observations
• The Onset of 3D Magnetic Reconnection and Heating in the Solar Corona
• Microwave Imaging of Quasi-periodic Pulsations at Flare Current Sheet
• Formation and Reconnection of Three-dimensional Current Sheets with a Guide Field in the Solar Corona
• Inverse energy transfer in decaying, three dimensional, nonhelical magnetic turbulence due to magnetic reconnection
• Forward Modeling of SDO/AIA and X-Ray Emission from a Simulated Flux Rope Ejection
• Numerical Study on Excitation of Turbulence and Oscillation in Above-the-loop-top Region of a Solar Flare
• Annihilation of Magnetic Islands at the Top of Solar Flare Loops
• Plasmoid-dominated Turbulent Reconnection in a Low $\beta$ Plasma
• Current-sheet Oscillations Caused by Kelvin-Helmholtz Instability at the Loop Top of Solar Flares
• Impact of 3D Structure on Magnetic Reconnection

Cited by in corpus (6)

• Investigating Turbulence Effects on Magnetic Reconnection Rates Through Three-Dimensional Resistive Magnetohydrodynamical Simulations
• A Method for Determining the Locations and Configurations of Magnetic Reconnection within 3D Turbulent Plasmas
• Do plasmoids induce fast magnetic reconnection in well-resolved current sheets in 2D MHD simulations?
• Nonthermal electron acceleration in turbulent post-flare coronal loops
• Studying the properties of reconnection-driven turbulence
• Understanding observational characteristics of solar flare current sheets