Combining MHD and kinetic modelling of solar flares
arXiv:1809.05751 · doi:10.1016/j.asr.2018.09.024
Abstract
Solar flares are explosive events in the solar corona, representing fast conversion of magnetic energy into thermal and kinetic energy, and hence radiation, due to magnetic reconnection. Modelling is essential for understanding and predicting these events. However, self-consistent modelling is extremely difficult due to the vast spatial and temporal scale separation between processes involving thermal plasma (normally considered using magnetohydrodynamic (MHD) approach) and non-thermal plasma (requiring a kinetic approach). In this mini-review we consider different approaches aimed at bridging the gap between fluid and kinetic modelling of solar flares. Two types of approaches are discussed: combined MHD/test-particle (MHDTP) models, which can be used for modelling the flaring corona with relatively small numbers of energetic particles, and hybrid fluid-kinetic methods, which can be used for modelling stronger events with higher numbers of energetic particles. Two specific examples are discussed in more detail: MHDTP models of magnetic reconnection and particle acceleration in kink-unstable twisted coronal loops, and a novel reduced-kinetic model of particle transport.
arXiv commentAccepted as a mini-review in Advances in Space Research
References in corpus (49)
- Recent Advances in Understanding Particle Acceleration Processes in Solar Flares
- Acceleration and propagation of Solar Energetic Particles
- Non-Thermal Electron Acceleration in Low Mach Number Collisionless Shocks. I. Particle Energy Spectra and Acceleration Mechanism
- Spontaneous current-layer fragmentation and cascading reconnection in solar flares: I. Model and analysis
- Three-dimensional magnetic reconnection regimes: A review
- Flows and Non-thermal Velocities in Solar Active Regions Observed with the Extreme-ultraviolet Imaging Spectrometer on Hinode: A Tracer of Active Region Sources of Heliospheric Magnetic Fields?
- Imaging Spectroscopy of Solar Radio Burst Fine Structures
- Turbulent kinetic energy in the energy balance of a solar flare
- Local re-acceleration and a modified thick target model of solar flare electrons
- 3D Radio and X-Ray Modeling and Data Analysis Software: Revealing Flare Complexity
- Particle acceleration and transport in reconnecting twisted loops in a stratified atmosphere
- Particle Acceleration in Multiple Dissipation Regions
- Particle Acceleration at a Flare Termination Shock: Effect of Large-scale Magnetic Turbulence
- Acceleration, magnetic fluctuations and cross-field transport of energetic electrons in a solar flare loop
- An MHD avalanche model of multi-threaded coronal loop
- Electron acceleration by cascading reconnection in the solar corona I Magnetic gradient and curvature effects
- Particle trajectories and acceleration during 3D fan reconnection
- Effect of collisions and magnetic convergence on electron acceleration and transport in reconnecting twisted solar flare loops
- Collisionless Reconnection in the Large Guide Field Regime: Gyrokinetic Versus Particle-in-Cell Simulations
- Kinetic modeling of particle acceleration in a solar null point reconnection region
- Solar Particle Acceleration at Reconnecting 3D Null Points
- Reconnection and particle acceleration in interacting flux ropes -- II. 3D effects on test particles in magnetically dominated plasmas
- Particle Acceleration and Fractional Transport in Turbulent Reconnection
- Reconnection and particle acceleration in interacting flux ropes I. Magnetohydrodynamics and test particles in 2.5D
- Two-way coupling of magnetohydrodynamic simulations with embedded particle-in-cell simulations
- Thermal and non-thermal emission from reconnecting twisted coronal loops
- Particle acceleration in a reconnecting current sheet: PIC simulation
- Particle acceleration by circularly and elliptically polarised dispersive Alfven waves in a transversely inhomogeneous plasma in the inertial and kinetic regimes
- Neutral Vlasov kinetic theory of magnetized plasmas
- Coupled Vlasov and two-fluid codes on GPUs
- A Systematic Examination of Particle Motion in a Collapsing Magnetic Trap Model for Solar Flares
- Multiple scale kinetic simulations with the energy conserving semi implicit particle in cell (PIC) method
- Soft X-ray emission in kink-unstable coronal loops
- Dynamics of double layers, ion acceleration and heat flux suppression during solar flares
- Simulations of Gyrosynchrotron Microwave Emission from an Oscillating 3D Magnetic Loop
- Observational signatures of the coronal kink instability with thermal conduction
- Plasma motions and non-thermal line broadening in flaring twisted coronal loops
- Test particle acceleration in a numerical MHD experiment of an anemone jet
- Particle acceleration at a reconnecting magnetic separator
- Physics of collisionless reconnection in a stressed X-point collapse
- An Extension of the Theory of Kinematic MHD Models of Collapsing Magnetic Traps to 2.5D with shear flow and to 3D
- Energy release in driven twisted coronal loops
- Flare particle acceleration in the interaction of twisted coronal flux ropes
- Polarisation of microwave emission from reconnecting twisted coronal loops
- Particle acceleration with anomalous pitch angle scattering in 2D MHD reconnection simulations
- Observational signatures of a kink-unstable coronal flux rope using Hinode/EIS
- Modelling of Nonthermal Microwave Emission From Twisted Magnetic Loops
- Role of Electron Inertia and Reconnection Dynamics in a Stressed X-point Collapse with a Guide-Field
- Probing Twisted Magnetic Field Using Microwave Observations in an M Class Solar Flare on 11 February, 2014
Cited by in corpus (7)
- Ultimate Fast Gyrosynchrotron Codes
- Large-Scale Parallel Electric Fields and Return Currents in a Global Simulation Model
- Forward modelling of particle acceleration and transport in an individual solar flare
- Particle acceleration and their escape into the heliosphere in solar flares with open magnetic field
- Test particle sampling and particle acceleration in a 2D coronal plasmoid-mediated reconnecting current sheet
- Inferring the magnetic field asymmetry of solar flares from the degree of polarisation at millimetre wavelengths
- Numerical Investigation of Efficient Electron Acceleration at an Unsteady Solar Flare Loop-Top