134 citations · 1.4k across the 58 of their papers we have counts for
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On the Nature of Candle-Flame-Shaped Solar Flares and Sub-Alfvénic Supra-Arcade Plasma Downflows
Ivan Oparin, Sabastian Fernandes, Bin Chen +4
Certain solar flares exhibit a distinctive candle-flame or cusp-shaped feature above the bright flare arcade visible in extreme ultraviolet (EUV) and X-ray channels sensitive to hi…
The Role of Magnetic Reconnection in Energizing Protons and Heavier Ions at the Heliospheric Current Sheet
Giulia Murtas, Xiaocan Li, Fan Guo +3
During near-Sun crossings of the heliospheric current sheet (HCS), Parker Solar Probe (PSP) observed populations of high-energy protons and heavier ions indicating possible energiz…
Turbulence and its Potential Impact on Solar Chromospheric and Coronal Heating
Gary P. Zank, Xiaocan Li, Krishna Khanal +8
Low-frequency turbulence in the solar chromosphere remains poorly understood. We address 1) the sources of low-frequency turbulence that potentially heat the chromosphere, and 2) h…
Energy Conversion and Electron Acceleration and Transport in 3D Simulations of Solar Flares
Xiaocan Li, Chengcai Shen, Xiaoyan Xie +6
Recent observations and simulations indicate that solar flares undergo extremely complex three-dimensional (3D) evolution, making 3D particle transport models essential for underst…
Modeling of Ionization and Recombination Processes in Plasma with Arbitrary Non-Maxwellian Electron Distributions
Chengcai Shen, Xiaocan Li, Yuan-Kuen Ko +4
In astronomical environments, the high-temperature emission of plasma mainly depends on ion charge states, which requires accurate analysis of the ionization and recombination proc…
Anisotropic Turbulent Flows Observed in Above the Loop-top Regions During Solar Flares
Xiaoyan Xie, Chengcai Shen, Katharine Reeves +6
Solar flare above-the-loop-top (ALT) regions are vital for understanding solar eruptions and fundamental processes in plasma physics. Recent advances in 3D MHD simulations have rev…
Compression Acceleration of Protons and Heavier Ions at the Heliospheric Current Sheet
Giulia Murtas, Xiaocan Li, Fan Guo
Recent observations by Parker Solar Probe (PSP) suggest that protons and heavier ions are accelerated to high energies by magnetic reconnection at the heliospheric current sheet (H…
Energetic Electrons Accelerated and Trapped in a Magnetic Bottle above a Solar Flare Arcade
Bin Chen, Xiangliang Kong, Sijie Yu +6
Where and how flares efficiently accelerate charged particles remains an unresolved question. Recent studies revealed that a "magnetic bottle" structure, which forms near the botto…
Plasma Dynamics and Nonthermal Particle Acceleration in 3D Nonrelativistic Magnetic Reconnection
Qile Zhang, Fan Guo, William Daughton +2
Understanding plasma dynamics and nonthermal particle acceleration in 3D magnetic reconnection has been a long-standing challenge. In this paper, we explore these problems by perfo…
Particle acceleration in solar flares with imaging-spectroscopy in soft X-rays
Mitsuo Oka, Amir Caspi, Bin Chen +15
Particles are accelerated to very high, non-thermal energies during explosive energy-release phenomena in space, solar, and astrophysical plasma environments. In the case of solar…
Numerical Modeling of Energetic Electron Acceleration, Transport, and Emission in Solar Flares: Connecting Loop-top and Footpoint Hard X-Ray Sources
Xiangliang Kong, Bin Chen, Fan Guo +8
The acceleration and transport of energetic electrons during solar flares is one of the outstanding topics in solar physics. Recent X-ray and radio imaging and spectroscopy observa…
Particle Acceleration in Magnetic Reconnection with Ad hoc Pitch-angle Scattering
Grant Johnson, Patrick Kilian, Fan Guo +1
Particle acceleration during magnetic reconnection is a long-standing topic in space, solar and astrophysical plasmas. Recent 3D particle-in-cell simulations of magnetic reconnecti…
Modeling Electron Acceleration and Transport in the Early Impulsive Phase of the 2017 September 10 Solar Flare
Xiaocan Li, Fan Guo, Bin Chen +2
The X8.2-class limb flare on September 10, 2017 is among the best studied solar flare events owing to its great similarity to the standard flare model and the broad coverage by mul…
A model of double coronal hard X-ray sources in solar flares
Xiangliang Kong, Jing Ye, Bin Chen +6
A number of double coronal X-ray sources have been observed during solar flares by RHESSI, where the two sources reside at different sides of the inferred reconnection site. Howeve…
Variable Ion Compositions of Solar Energetic Particle Events in the Inner Heliosphere: A Field-line Braiding Model with Compound Injections
Fan Guo, Lulu Zhao, Christina M. S. Cohen +8
We propose a model for interpreting highly variable ion composition ratios in solar energetic particles (SEP) events recently observed by Parker Solar Probe (PSP) at a…
Efficient Nonthermal Ion and Electron Acceleration Enabled by the Flux-Rope Kink Instability in 3D Nonrelativistic Magnetic Reconnection
Qile Zhang, Fan Guo, William Daughton +2
The relaxation of field-line tension during magnetic reconnection gives rise to a universal Fermi acceleration process involving the curvature drift of particles. However, the effi…
The Effect of Thermal Pressure on Collisionless Magnetic Reconnection Rate
Xiaocan Li, Yi-Hsin Liu
Modeling collisionless magnetic reconnection rate is an outstanding challenge in basic plasma physics research. While the seemingly universal rate of an order is…
Fast Magnetic Reconnection with Turbulence in High Lundquist Number Limit
Yang Liping, Li Hui, Guo Fan +5
We use extensive 3D resistive MHD simulations to study how large-scale current sheets will undergo fast reconnection in the high Lundquist number limit (above ), whe…
Formation of Power-law Electron Energy Spectra in Three-dimensional Low- Magnetic Reconnection
Xiaocan Li, Fan Guo, Hui Li +2
While observations have suggested that power-law electron energy spectra are a common outcome of strong energy release during magnetic reconnection, e.g., in solar flares, kinetic…
Plasma Energization in Colliding Magnetic Flux Ropes
Senbei Du, Fan Guo, Gary P. Zank +2
Magnetic flux ropes are commonly observed throughout the heliosphere, and recent studies suggest that interacting flux ropes are associated with some energetic particle events. In…
Large-scale Compression Acceleration during Magnetic Reconnection in a Low- Plasma
Xiaocan Li, Fan Guo, Hui Li +1
In solar flares and other astrophysical systems, a major challenge for solving particle acceleration problem associated with magnetic reconnection is the enormous scale separation…
Nonthermally Dominated Electron Acceleration during Magnetic Reconnection in a Low-beta Plasma
Xiaocan Li, Fan Guo, Hui Li +1
By means of fully kinetic simulations, we investigate electron acceleration during magnetic reconnection in a nonrelativistic proton--electron plasma with conditions similar to sol…