Shocks and instabilities in the partially ionised solar atmosphere
arXiv:2302.07362 · doi:10.1016/j.asr.2022.08.079
Abstract
The low solar atmosphere is composed of mostly neutral particles, but the importance of the magnetic field for understanding observed dynamics means that interactions between charged and neutral particles play a very important role in controlling the macroscopic fluid motions. As the exchange of momentum between fluids, essential for the neutral fluid to effectively feel the Lorentz force, is through collisional interactions, the relative timescale of these interactions to the dynamic timescale determines whether a single-fluid model or, when the dynamic frequency is higher, the more detailed two-fluid model is the more appropriate. However, as many MHD phenomena fundamentally contain multi-time-scale processes, even large-scale, long-timescale motions can have an important physical contribution from two-fluid processes. In this review we will focus on two-fluid models, looking in detail at two areas where the multi-time-scale nature of the solar atmosphere means that two-fluid physics can easily develop: shock-waves and instabilities. We then connect these ideas to observations attempting to diagnose two-fluid behaviour in the solar atmosphere, suggesting some ways forward to bring observations and simulations closer together.
arXiv comment22 pages, 9 figures, published open access version
References in corpus (67)
- Instability of current sheets and formation of plasmoid chains
- On the Origin of Cosmic Magnetic Fields
- Dynamic Hydrogen Ionization
- Magnetic reconnection and stochastic plasmoid chains in high-Lundquist-number plasmas
- Propagating waves along spicules
- Giant Chromospheric Anemone Jet Observed with Hinode and Comparison with Magnetohydrodynamic Simulations: Evidence of Propagating Alfven Waves and Magnetic Reconnection
- An Interface Region Imaging Spectrograph first view on Solar Spicules
- Fast magnetic reconnection in the solar chromosphere mediated by the plasmoid instability
- Fluid description of multi-component solar partially ionized plasma
- Multi-fluid simulations of chromospheric magnetic reconnection in a weakly ionized reacting plasma
- Collisions, magnetization, and transport coefficients in the lower solar atmosphere
- Ionized Plasma and Neutral Gas Coupling in the Sun's Chromosphere and Earth's Ionosphere/Thermosphere
- Alfven waves in a partially ionized two-fluid plasma
- Rayleigh-Taylor instability in prominences from numerical simulations including partial ionization effects
- Two-fluid simulations of waves in the solar chromosphere I: numerical code verification
- The generation and damping of propagating MHD kink waves in the solar atmosphere
- Magnetoacoustic waves in a partially ionized two-fluid plasma
- A statistical study of transverse oscillations in a quiescent prominence
- Magnetohydrodynamics of the Weakly Ionized Solar Photosphere
- On the Dynamical Overstability of Radiative Blast Waves: The Atomic Physics of Shock Stability
- Kelvin-Helmholtz instability in partially ionized compressible plasmas
- The formation and evolution of reconnection-driven slow-mode shocks in a partially ionised plasma
- The Magnetic Response of the Solar Atmosphere to Umbral Flashes
- Alfvenic Turbulence Beyond the Ambipolar Diffusion Scale
- Quiescent prominence dynamics observed with the Hinode Solar Optical Telescope . II. Prominence Bubble Boundary Layer Characteristics and the Onset of a Coupled Kelvin-Helmholtz Rayleigh-Taylor Instability
- Rayleigh-Taylor instability in partially ionized compressible plasmas: one fluid approach
- Nonequilibrium ionization and ambipolar diffusion in solar magnetic flux emergence processes
- Two-fluid simulations of waves in the solar chromosphere II. Propagation and damping of fast magneto-acoustic waves and shocks
- Observational detection of drift velocity between ionized and neutral species in solar prominences
- Observations of the Kelvin-Helmholtz instability driven by dynamic motions in a solar prominence
- Shocks and Thermal Conduction Fronts in Retracting Reconnected Flux Tubes
- Two-fluid simulations of Rayleigh-Taylor instability in a magnetized solar prominence thread. I. Effects of prominence magnetization and mass loading
- Observations and modeling of the onset of fast reconnection in the solar transition region
- Ambipolar diffusion in the Bifrost code
- Chromospheric magnetic reconnection: Two-fluid simulations of coalescing current loops
- Magnetohydrodynamic Non-linearities in Sunspot Atmospheres: Chromospheric Detections of Intermediate Shocks
- Turbulent characteristics in the intensity fluctuations of a solar quiescent prominence observed by the \textit{Hinode} Solar Optical Telescope
- Helical motions of fine-structure prominence threads observed by Hinode and IRIS
- Differences between Doppler velocities of ions and neutral atoms in a solar prominence
- Onset of the Kelvin-Helmholtz instability in partially ionized magnetic flux tubes
- Two-fluid Modeling of Acoustic Wave Propagation in Gravitationally Stratified Isothermal Media
- Coronal cooling as a result of mixing by the nonlinear Kelvin--Helmholtz instability
- Ion-neutral decoupling in the nonlinear Kelvin--Helmholtz instability: Case of field-aligned flow
- Intermediate shock substructures within a slow-mode shock occurring in partially ionised plasma
- Two-fluid simulations of Rayleigh-Taylor instability in a magnetized solar prominence thread II. Effects of collisionality
- Heating of a Quiet Region of the Solar Chromosphere by Ion and Neutral Acoustic Waves
- Evolution of the Kippenhahn-Schlueter Prominence Model Magnetic Field Under Cowling Resistivity
- Simulations of Alfven wave driving of the solar chromosphere - efficient heating and spicule launching
- Joint action of Hall and ambipolar effects in 3D magneto-convection simulations of the quiet Sun. I. Dissipation and generation of waves
- On the support of neutrals against gravity in solar prominences
- Collisional ionisation, recombination and ionisation potential in two-fluid slow-mode shocks: analytical and numerical results
- The Kelvin-Helmholtz instability in weakly ionised plasmas: Ambipolar dominated and Hall dominated flows
- Waves in weakly ionised solar plasmas
- Coalescence Instability in Chromospheric Partially Ionised Plasmas
- Evidence for the two fluid scenario in solar prominences
- Nonlinear Instability and Intermittent Nature of Magnetic Reconnection in Solar Chromosphere
- Chromospheric heating and generation of plasma outflows by impulsively generated two-fluid magnetoacoustic waves
- Diagnosis of Magnetic and Electric Fields of Chromospheric Jets through Spectropolarimetric Observations of HI Paschen Lines
- Investigating prominence turbulence with Hinode SOT Dopplergrams
- Dynamic evolution of current sheets, ideal tearing, plasmoid formation and generalized fractal reconnection scaling relations
- Velocity difference of ions and neutrals in solar prominences
- Stability of two-fluid partially-ionised slow-mode shock fronts
- The Kelvin-Helmholtz instability in weakly ionised plasmas II: multifluid effects in molecular clouds
- Mode conversion of two-fluid shocks in a partially-ionised, isothermal, stratified atmosphere
- Tearing modes in partially ionized plasmas
- Simulations of the Biermann battery mechanism in two-fluid partially ionised plasmas
- Smoothing of MHD Shocks in Mode Conversion