566 citations · 4.6k across the 89 of their papers we have counts for
31 papers · 1 filter
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…
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…
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…
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…
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…
First-Principle Prediction of X-ray Polarization from Magnetic Reconnection in High-Frequency BL Lacs
Haocheng Zhang, Xiaocan Li, Dimitrios Giannios +1
Relativistic magnetic reconnection is a potential particle acceleration mechanism for high-frequency BL Lacs (HBLs). The {\it Imaging X-ray Polarimetry Explorer} ({\it IXPE}) sched…
Fermi-type particle acceleration from magnetic reconnection at the termination shock of a relativistic striped wind
Yingchao Lu, Fan Guo, Patrick Kilian +3
An oblique-rotating pulsar generates a relativistic striped wind in a pulsar wind nebula (PWN). The termination shock of the PWN compresses the Poynting-flux-dominated flow and dri…
Radiation and Polarization Signatures from Magnetic Reconnection in Relativistic Jets--I. A Systematic Study
Haocheng Zhang, Xiaocan Li, Dimitrios Giannios +3
Blazars are relativistic magnetized plasma outflows from supermassive black holes that point very close to our line of sight. Their emission is nonthermal dominated and highly vari…
Magnetic Energy Release, Plasma Dynamics, and Particle Acceleration during Relativistic Turbulent Magnetic Reconnection
Fan Guo, Xiaocan Li, William Daughton +5
In strongly magnetized astrophysical plasma systems, magnetic reconnection is believed to be a primary process during which explosive energy release and particle acceleration occur…
Recent Progress on Particle Acceleration and Reconnection Physics during Magnetic Reconnectionin the Magnetically-dominated Relativistic Regime
Fan Guo, Yi-Hsin Liu, Xiaocan Li +3
Magnetic reconnection in strongly magnetized astrophysical plasma environments is believed to be the primary process for fast energy release and particle energization. Currently th…
Exploring the acceleration mechanisms for particle injection and power-law formation during trans-relativistic magnetic reconnection
Patrick Kilian, Xiaocan Li, Fan Guo +1
Magnetic reconnection in the relativistic and trans-relativistic regimes is able to accelerate particles to hard power law energy spectra (approaching ). Th…
The Critical Role of Collisionless Plasma Energization on the Structure of Relativistic Magnetic Reconnection
Yi-Hsin Liu, Shan-Chang Lin, Michael Hesse +4
During magnetically dominated relativistic reconnection, inflowing plasma depletes the initial relativistic pressure at the x-line and collisionless plasma heating inside the diffu…
Neutrinos, Cosmic Rays and the MeV Band
R. Ojha, H. Zhang, M. Kadler +23
The possible association of the blazar TXS 0506+056 with a high-energy neutrino detected by IceCube holds the tantalizing potential to answer three astrophysical questions: 1. Wher…
High-Energy Polarimetry - a new window to probe extreme physics in AGN jets
B. Rani, H. Zhang, S. D. Hunter +31
The constantly improving sensitivity of ground-based and space-borne observatories has made possible the detection of high-energy emission (X-rays and gamma-rays) from several thou…
Determining the Dominant Acceleration Mechanism during Relativistic Magnetic Reconnection in Large-scale Systems
Fan Guo, Xiaocan Li, William Daughton +5
While a growing body of research indicates that relativistic magnetic reconnection is a prodigious source of particle acceleration in high-energy astrophysical systems, the dominan…
Large-Amplitude Blazar Polarization Angle Swing as a Signature of Magnetic Reconnection
Haocheng Zhang, Xiaocan Li, Fan Guo +1
Relativistic magnetic reconnection events can widely exist in magnetized plasmas in astrophysical systems. During this process, oppositely directed magnetic field lines reconnect a…
Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth
A. U. Abeysekara, A. Albert, R. Alfaro +113
The unexpectedly high flux of cosmic ray positrons detected at Earth may originate from nearby astrophysical sources, dark matter, or unknown processes of cosmic-ray secondary prod…
Polarization Signatures of Kink Instabilities in the Blazar Emission Region from Relativistic Magnetohydrodynamic Simulations
Haocheng Zhang, Hui Li, Fan Guo +1
Kink instabilities are likely to occur in the current-carrying magnetized plasma jets. Recent observations of the blazar radiation and polarization signatures suggest that the blaz…
A model of global magnetic reconnection rate in relativistic collisionless plasmas
Yi-Hsin Liu, Michael Hesse, Fan Guo +2
A model of global magnetic reconnection rate in relativistic collisionless plasmas is developed and validated by the fully kinetic simulation. Through considering the force balance…
Particle Acceleration during Magnetic Reconnection in a Low-beta Pair Plasma
Fan Guo, Hui Li, William Daughton +2
Plasma energization through magnetic reconnection in the magnetically-dominated regime featured by low plasma beta () and/or high magnetization ($σ= B^2/(4 π…
Efficient Production of High-energy Nonthermal Particles during Magnetic Reconnection in a Magnetically-dominated Ion-Electron Plasma
Fan Guo, Xiaocan Li, Hui Li +6
Magnetic reconnection is a leading mechanism for dissipating magnetic energy and accelerating nonthermal particles in Poynting-flux dominated flows. In this letter, we investigate…
Particle Acceleration and Plasma Dynamics during Magnetic Reconnection in the Magnetically-dominated Regime
Fan Guo, Yi-Hsin Liu, William Daughton +1
Magnetic reconnection is thought to be the driver for many explosive phenomena in the universe. The energy release and particle acceleration during reconnection have been proposed…
Polarization Swings Reveal Magnetic Energy Dissipation in Blazars
Haocheng Zhang, Xuhui Chen, Markus Boettcher +2
The polarization signatures of the blazar emissions are known to be highly variable. In addition to small fluctuations of the polarization angle around a mean value, sometimes larg…