First multipoint L1 observations reveal spatially varying MHD turbulence with strong anisotropies, shock-modified sheath regions, and compressible signatures in the October 2024 ICME.
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2: Strong alfvenic turbulence
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EHT data show a 51.8 microarcsecond ring around Sgr A* consistent with the shadow of a 4 million solar mass Kerr black hole viewed at moderate inclination.
In magnetically dominated relativistic collisionless plasmas, Alfvén and slow modes follow anisotropic Goldreich-Sridhar scaling, fast modes are isotropic with larger kinetic energy fraction, and dynamic alignment weakens near kinetic scales due to thermal fluctuations.
MMS data from a 2023 CME show elevated electron temperatures with superthermal tails, depleted mid-energy electrons, and weak MHD-like turbulence with reduced intermittency in the rare sub-Alfvénic solar wind at 1 AU.
Turbulent electron-ion coronae around accreting black holes self-regulate into a two-temperature state that generates nonthermal ions and X-ray spectra consistent with observations including an MeV tail.
Relativistic transport model for beta-particles in homologously expanding kilonova ejecta, incorporating per-species atomic data, shows non-local deposition and escape lower thermalization efficiency with analytic prescriptions supplied for light-curve codes.
Imbalanced turbulence throttles its cascade via the helicity barrier, yielding flat spectra (η<2) that invert minor-ion heating to Q_i ∝ Q_p A_i (A_i/Z_i)^{η-2}, with simulations across β_p0 confirming the (A_i/Z_i)^a trend and strong perpendicular heating at low β.
IRIS observations of polar spicules reveal multiscale Alfvénic velocity fluctuations with a k_perp^{-1.43} spectrum, intermittency, and spatial coherence consistent with developing turbulence.
Numerical simulations indicate that particle scattering in anisotropic turbulence without a guide field is independent of correlation length and follows a mechanism distinct from pitch-angle diffusion.
Observed CR pitch-angle diffusion matches quasi-slab fast-mode turbulence predictions shaped by damping, but not Alfvénic turbulence, evidencing fast-mode dominance and constraining LISM to low beta ≈0.1 with δB/B0 ≈0.5.
Three-dimensional three-temperature simulations of colliding supersonic plasma flows from irradiated CH mesh targets produce a persistent shocked turbulent mixing layer that evolves toward an isothermal state with anisotropic Reynolds stress and effective Reynolds number around 200.
Observational study of MBM12 shows CO-to-H2 conversion factor near galactic average with density-dependent variations, high virial parameters decreasing at small scales, broken power-law mass-size relations indicating external pressure, and magnetic field orientation transition at N(H2) = 4.5e21 cm-
Simulations demonstrate non-monotonic guide-field regulation of reconnection efficiency via balance between drift-kink suppression and tearing-mode hindrance in 3D relativistic current sheets.
Curvature acceleration in strong Alfvénic turbulence saturates due to diminishing energy exchange efficiency, producing particle distributions f(p) ∝ p^{-3} (non-relativistic) and f(γ) ∝ γ^{-3} (ultrarelativistic).
A multi-ion solar wind simulation with reflection-driven turbulence reproduces observed preferential heating of oxygen ions when compared to UVCS and SWICS data.
Observational modeling of GWA and LAB survey spectra yields 19.8% CNM, 32.5% UNM and 47.8% WNM, in agreement with the TIGRESS-NCR simulation under fixed spin-temperature boundaries.
A review summarizing pitfalls in older CR-MHD models and progress toward more rigorous treatments that connect microphysical CR scales to galactic dynamics.
This review summarizes the basic principles of electron transport in inhomogeneous and tangled magnetic fields through gyro-centre trajectories, kinetic instabilities, trapping, and diffusion processes.
Review summarizing observational data on the Milky Way's magnetic field structure, including spiral alignment, halo components, turbulence, and correlations with interstellar gas and dust.
citing papers explorer
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Turbulence Mode Decomposition and Anisotropy in Magnetically Dominated Collisionless Plasmas
In magnetically dominated relativistic collisionless plasmas, Alfvén and slow modes follow anisotropic Goldreich-Sridhar scaling, fast modes are isotropic with larger kinetic energy fraction, and dynamic alignment weakens near kinetic scales due to thermal fluctuations.
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MMS Insights into CME Driven Sub-Alfv\'enic Solar Wind at 1 AU
MMS data from a 2023 CME show elevated electron temperatures with superthermal tails, depleted mid-energy electrons, and weak MHD-like turbulence with reduced intermittency in the rare sub-Alfvénic solar wind at 1 AU.
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Beta-Particle Transport and Thermalization in Kilonova Ejecta with Detailed Atomic Microphysics
Relativistic transport model for beta-particles in homologously expanding kilonova ejecta, incorporating per-species atomic data, shows non-local deposition and escape lower thermalization efficiency with analytic prescriptions supplied for light-curve codes.
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Spatially Coherent and Intermittent Alfv\'enic Fluctuations in Solar Polar Spicules
IRIS observations of polar spicules reveal multiscale Alfvénic velocity fluctuations with a k_perp^{-1.43} spectrum, intermittency, and spatial coherence consistent with developing turbulence.
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High-energy Particle Transport in Three-dimensional Anisotropic Turbulent Magnetic Fields
Numerical simulations indicate that particle scattering in anisotropic turbulence without a guide field is independent of correlation length and follows a mechanism distinct from pitch-angle diffusion.
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Pitch-Angle Scattering of Cosmic Rays: Confronting Theory with Observations
Observed CR pitch-angle diffusion matches quasi-slab fast-mode turbulence predictions shaped by damping, but not Alfvénic turbulence, evidencing fast-mode dominance and constraining LISM to low beta ≈0.1 with δB/B0 ≈0.5.
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Numerical simulations of shock-driven, supersonic turbulence in colliding three-temperature laboratory plasmas
Three-dimensional three-temperature simulations of colliding supersonic plasma flows from irradiated CH mesh targets produce a persistent shocked turbulent mixing layer that evolves toward an isothermal state with anisotropic Reynolds stress and effective Reynolds number around 200.
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B-Fields and Star Formation across Scales with TRAO (B-FROST): CO Abundances, Dynamics and Relative Orientations in the Translucent High Latitude Cloud MBM12
Observational study of MBM12 shows CO-to-H2 conversion factor near galactic average with density-dependent variations, high virial parameters decreasing at small scales, broken power-law mass-size relations indicating external pressure, and magnetic field orientation transition at N(H2) = 4.5e21 cm-
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Guide-Field-mediated Multiscale Instabilities in Relativistic Reconnection
Simulations demonstrate non-monotonic guide-field regulation of reconnection efficiency via balance between drift-kink suppression and tearing-mode hindrance in 3D relativistic current sheets.
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Distributions of particles accelerated by strong Alfv\'enic turbulence
Curvature acceleration in strong Alfvénic turbulence saturates due to diminishing energy exchange efficiency, producing particle distributions f(p) ∝ p^{-3} (non-relativistic) and f(γ) ∝ γ^{-3} (ultrarelativistic).
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Global Multi-ion Solar Wind Model. I. Ion Temperatures
A multi-ion solar wind simulation with reflection-driven turbulence reproduces observed preferential heating of oxygen ions when compared to UVCS and SWICS data.
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Gas Phase Distribution in the Neutral ISM: A Comparison between Observation and Numerical Simulation
Observational modeling of GWA and LAB survey spectra yields 19.8% CNM, 32.5% UNM and 47.8% WNM, in agreement with the TIGRESS-NCR simulation under fixed spin-temperature boundaries.
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Cosmic Rays on Galaxy Scales: Progress and Pitfalls for CR-MHD Dynamical Models
A review summarizing pitfalls in older CR-MHD models and progress toward more rigorous treatments that connect microphysical CR scales to galactic dynamics.
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Transport of electrons in tangled magnetic fields
This review summarizes the basic principles of electron transport in inhomogeneous and tangled magnetic fields through gyro-centre trajectories, kinetic instabilities, trapping, and diffusion processes.
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The magnetic field of the Milky Way: an observational perspective
Review summarizing observational data on the Milky Way's magnetic field structure, including spiral alignment, halo components, turbulence, and correlations with interstellar gas and dust.