566 citations · 4.6k across the 89 of their papers we have counts for
90 papers
Next-Generation Comprehensive Data-Driven Models of Solar Eruptive Events
Joel C. Allred, Graham S. Kerr, Meriem Alaoui +11
Solar flares and coronal mass ejections are interrelated phenomena that together are known as solar eruptive events. These are the main drivers of space weather and understanding t…
Effects of Coronal Magnetic Field Configuration on Particle Acceleration and Release during the Ground Level Enhancement Events in Solar Cycle 24
Wenlong Liu, Xiangliang Kong, Fan Guo +6
Ground level enhancements (GLEs) are extreme solar energetic particle (SEP) events that are of particular importance in space weather. In solar cycle 24, two GLEs were recorded on…
Particle acceleration by magnetic reconnection in geospace
Mitsuo Oka, Joachim Birn, Jan Egedal +7
Particles are accelerated to very high, non-thermal energies during explosive energy-release phenomena in space, solar, and astrophysical plasma environments. While it has been est…
The need for focused, hard X-ray investigations of the Sun
Lindsay Glesener, Albert Y. Shih, Amir Caspi +46
Understanding the nature of energetic particles in the solar atmosphere is one of the most important outstanding problems in heliophysics. Flare-accelerated particles compose a hug…
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…
A Model for Nonthermal Particle Acceleration in Relativistic Magnetic Reconnection
Xiaocan Li, Fan Guo, Yi-Hsin Liu +1
The past decade has seen an outstanding development of nonthermal particle acceleration in magnetic reconnection in magnetically-dominated systems, with clear signatures of power-l…
Quantifying Energy Release in Solar Flares and Solar Eruptive Events: New Frontiers with a Next-Generation Solar Radio Facility
Bin Chen, Dale E. Gary, Sijie Yu +16
Solar flares and the often associated solar eruptive events serve as an outstanding laboratory to study the magnetic reconnection and the associated energy release and conversion p…
First-Principle-Integrated Study of Blazar Synchrotron Radiation and Polarization Signatures from Magnetic Turbulence
Haocheng Zhang, Alan Marscher, Fan Guo +3
Blazar emission is dominated by nonthermal radiation processes that are highly variable across the entire electromagnetic spectrum. Turbulence, which can be a major source of nonth…
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…
Solar Energetic Particle Acceleration at a Spherical Shock with the Shock Normal Angle Evolving in Space and Time
Xiaohang Chen, Joe Giacalone, Fan Guo
We present a 2D kinematic model to study the acceleration of solar energetic particles (SEPs) at a shock driven by a coronal mass ejection. The shock is assumed to be spherical abo…
Particle Injection and Nonthermal Particle Acceleration in Relativistic Magnetic Reconnection
Omar French, Fan Guo, Qile Zhang +1
Magnetic reconnection in the relativistic regime has been proposed as an important process for the efficient production of nonthermal particles and high-energy emissions. Using ful…
Advancing Theory and Modeling Efforts in Heliophysics
Fan Guo, Spiro Antiochos, Paul Cassak +15
Heliophysics theory and modeling build understanding from fundamental principles to motivate, interpret, and predict observations. Together with observational analysis, they consti…
Comment on "Nonideal Fields Solve the Injection Problem in Relativistic Reconnection"
Fan Guo, Xiaocan Li, Omar French +7
Recently, Sironi (PRL, 128, 145102; S22) reported the correlation between particles accelerated into high energy and their crossings of regions with electric field larger than magn…
Modeling the inner part of M87 jet: confronting jet morphology with theory
Hai Yang, Feng Yuan, Hui Li +5
The formation of jets in black hole accretion systems is a long-standing problem. It has been proposed that a jet can be formed by extracting the rotation energy of the black hole…
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…
Direct measurement of non-thermal electron acceleration from magnetically driven reconnection in a laboratory plasma
Abraham Chien, Lan Gao, Shu Zhang +24
Magnetic reconnection is a ubiquitous astrophysical process that rapidly converts magnetic energy into some combination of plasma flow energy, thermal energy, and non-thermal energ…
Double-power-law feature of energetic particles accelerated at coronal shocks
Feiyu Yu, Xiangliang Kong, Fan Guo +4
Recent observations have shown that in many large solar energetic particle (SEP) events the event-integrated differential spectra resemble double power laws. We perform numerical m…
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…
Hybrid Paricle-in-Cell Simulations of Electromagnetic Coupling and Waves From Streaming Burst Debris
Brett D. Keenan, Ari Le, Dan Winske +4
Various systems can be modeled as a point-like explosion of ionized debris into a magnetized, collisionless background plasma -- including astrophysical examples, active experiment…
Radiation and Polarization Signatures from Magnetic Reconnection in Relativistic Jets--II. Connection with -rays
Haocheng Zhang, Xiaocan Li, Dimitrios Giannios +5
It is commonly believed that blazar jets are relativistic magnetized plasma outflows from supermassive black holes. One key question is how the jets dissipate magnetic energy to ac…
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…
Role of Parallel Solenoidal Electric Field on Energy Conversion in 2.5D Decaying Turbulence with a Guide Magnetic Field
Peera Pongkitiwanichakul, David Ruffolo, Fan Guo +5
We perform 2.5D particle-in-cell simulations of decaying turbulence in the presence of a guide (out-of-plane) background magnetic field. The fluctuating magnetic field initially co…
Astrophysical explosions revisited: collisionless coupling of debris to magnetized plasma
Ari Le, Dan Winske, Adam Stanier +4
The coupling between a rapidly expanding cloud of ionized debris and an ambient magnetized plasma is revisited with a hybrid (kinetic ion/fluid electron) simulation code that allow…