Zhongwei Yang
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View article: Unveiling the Mixing and Transport Processes of Solar Wind and Planetary Ions in the Magnetopause Boundary Layer
Unveiling the Mixing and Transport Processes of Solar Wind and Planetary Ions in the Magnetopause Boundary Layer Open
Kelvin–Helmholtz (KH) vortices are widely observed in astrophysics and heliophysics, including at Jovian and terrestrial magnetopauses, the Martian sheath–ionosphere boundary, the heliopause, and within stellar accretion disks. These vorti…
View article: Radial Evolution of Turbulence Spectra on the Jovian Magnetosheath Flanks: Juno Observations
Radial Evolution of Turbulence Spectra on the Jovian Magnetosheath Flanks: Juno Observations Open
The Jovian magnetosheath provides a unique environment for examining the radial evolution of magnetosheath turbulence due to its large spatial extent. Utilizing magnetic field measurements from the Juno spacecraft, this study examines the …
View article: Spectral Evolution of Pickup Ions across Interplanetary Shocks in the Outer Heliosphere: Observational Constraints and Transport Simulations
Spectral Evolution of Pickup Ions across Interplanetary Shocks in the Outer Heliosphere: Observational Constraints and Transport Simulations Open
Pickup ions (PUIs) often experience acceleration and heating as they traverse interplanetary shocks, leading to the formation of a distinct suprathermal tail in their energy spectra downstream of the shock. Combining in situ observations a…
View article: A Quantification Method for Plasma Exchange Across the Planetary Magnetopause Layer
A Quantification Method for Plasma Exchange Across the Planetary Magnetopause Layer Open
A universal method is proposed to quantify plasma exchange across the planetary magnetopause layer using the mixing rate, previously validated in local kinetic simulations of Kelvin–Helmholtz (KH) boundaries. When KH waves, magnetic reconn…
View article: Electron Beams Generated by the Electron Kelvin‐Helmholtz Instability at a Quasi‐Perpendicular Shock
Electron Beams Generated by the Electron Kelvin‐Helmholtz Instability at a Quasi‐Perpendicular Shock Open
Electron beams are considered to be important free energy sources for the excitation of various plasma waves at quasi‐perpendicular shocks. In this article, we perform a two‐dimensional particle‐in‐cell simulation of a low‐plasma‐ β quasi‐…
View article: Spatial Dependence of Ion‐Kinetic Instabilities in the Earth's Magnetosheath: MMS Observations
Spatial Dependence of Ion‐Kinetic Instabilities in the Earth's Magnetosheath: MMS Observations Open
The Earth's magnetosheath plasma frequently exhibits unequal temperatures parallel and perpendicular to the background magnetic field. This temperature anisotropy is crucial in exciting and dissipating electromagnetic fluctuations in vario…
View article: Electron Shock Drift Acceleration at a Low-Mach-number, Low-plasma-beta Quasi-perpendicular Shock
Electron Shock Drift Acceleration at a Low-Mach-number, Low-plasma-beta Quasi-perpendicular Shock Open
Shock drift acceleration (SDA) plays an important role in generating high-energy electrons at quasi-perpendicular shocks, but its efficiency in low-beta plasmas is questionable. In this article, we perform a two-dimensional particle-in-cel…
View article: Pickup Ion Modulation on Plateau-like Turbulence in the Martian Magnetosheath
Pickup Ion Modulation on Plateau-like Turbulence in the Martian Magnetosheath Open
The distribution of magnetic energy across scales, represented by the turbulence spectrum, provides insights into magnetic field dynamics in astrophysical and space plasma. While the Earth’s magnetosheath exhibits a conventional two-slope …
View article: Upstream plasma waves and downstream magnetic reconnection at a reforming quasi-parallel shock
Upstream plasma waves and downstream magnetic reconnection at a reforming quasi-parallel shock Open
With the help of a two-dimensional (2-D) particle-in-cell (PIC) simulation model, we investigate the long-time evolution of a quasi-parallel shock. Part of upstream ions are reflected by the shock front, and their interactions with the inc…
View article: Upstream Plasma Waves and Downstream Magnetic Reconnection at a Reforming Quasi-parallel Shock
Upstream Plasma Waves and Downstream Magnetic Reconnection at a Reforming Quasi-parallel Shock Open
With the help of a two-dimensional particle-in-cell simulation model, we investigate the long-time evolution (near , where Ω i 0 is the ion gyrofrequency in the upstream) of a quasi-para…
View article: Magnetosheath Jet-driven Bow Waves and Their Soft X-ray Imaging: Hybrid and PIC Simulations
Magnetosheath Jet-driven Bow Waves and Their Soft X-ray Imaging: Hybrid and PIC Simulations Open
View article: The magnetopause deformation indicated by fast cold ion motion
The magnetopause deformation indicated by fast cold ion motion Open
The magnetopause deformation due to the upstream magnetosheath pressure perturbations is important to understand the solar wind - magnetosphere coupling process, but how to identify such events from in-situ spacecraft observations is still…
View article: Formation of electron beam-like components in low-Mach-number quasi-perpendicular shock: Particle-in-cell simulation
Formation of electron beam-like components in low-Mach-number quasi-perpendicular shock: Particle-in-cell simulation Open
Collisionless shocks with low Alfvénic Mach numbers are expected to accelerate electrons, but the underlying physics are still unsolved. Two-dimensional particle-in-cell simulation of low-Mach-number quasi-perpendicular shock in low-β is p…
View article: Particle Energization at a High Mach Number Perpendicular Shock: 1D Particle-in-cell Simulations
Particle Energization at a High Mach Number Perpendicular Shock: 1D Particle-in-cell Simulations Open
In this paper, we use a 1D particle-in-cell simulation code to study particle preaccelerations at a high Mach number perpendicular shock. Our simulation results show that almost all of the injected particles can be reflected at the shock f…
View article: Deformations at Earth’s dayside magnetopause during quasi-radial IMF conditions: Global kinetic simulations and Soft X-ray Imaging
Deformations at Earth’s dayside magnetopause during quasi-radial IMF conditions: Global kinetic simulations and Soft X-ray Imaging Open
The Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) is a joint mission of the European Space Agency (ESA) and the Chinese Academy of Sciences (CAS). Primary goals are investigating the dynamic response of the Earth's magnetospher…
View article: Observation of gamma rays from the northern celestial sky up to the sub-PeV range with the Tibet air shower array and its underground muon detector array
Observation of gamma rays from the northern celestial sky up to the sub-PeV range with the Tibet air shower array and its underground muon detector array Open
Gamma-ray observation in the sub-PeV range helps us search for Galactic PeV cosmic-ray accelerators, PeVatrons. Measurement of the energy spectrum of gamma rays from astrophysical sources is especially crucial to discuss their hadronic or …
View article: Unveiling the Mixing and Transport Processes of Solar Wind and Planetary Ions in the Magnetopause Boundary Layer
Unveiling the Mixing and Transport Processes of Solar Wind and Planetary Ions in the Magnetopause Boundary Layer Open
Kelvin-Helmholtz (KH) vortices are widely observed in astrophysics and heliophysics, including at Jovian and terrestrial magnetopauses, the Martian sheath-ionosphere boundary, the heliopause, and within stellar accretion disks. These vorti…
View article: Particle-in-cell simulations of collisionless perpendicular shocks driven at a laser-plasma device
Particle-in-cell simulations of collisionless perpendicular shocks driven at a laser-plasma device Open
Experiments of generation of quasi-perpendicular collisionless shocks driven by laser plasma were performed at the Shenguang-II laser facility with intense lasers. Here, using a 1D particle-in-cell simulation code including protons, carbon…
View article: Kelvin–Helmholtz Instability at Mars: In Situ Observations and Kinetic Simulations
Kelvin–Helmholtz Instability at Mars: In Situ Observations and Kinetic Simulations Open
Kelvin–Helmholtz (K-H) instability is a fundamental boundary instability between two fluids with different speeds, exchanging the mass, momentum, and energy across the boundary. Although the K-H instability has been suggested to play a cri…
View article: Agyrotropic Electron Distributions in the Terrestrial Foreshock Transients
Agyrotropic Electron Distributions in the Terrestrial Foreshock Transients Open
Agyrotropic electron distributions are frequently taken as an indicator of electron diffusion regions of magnetic reconnection. However, they have also been found at electron‐scale boundaries of the non‐reconnecting magnetopause and are ge…
View article: Deformations at Earth's dayside magnetopause under quasi-radial IMF: implications for the SMILE soft X-ray imaging
Deformations at Earth's dayside magnetopause under quasi-radial IMF: implications for the SMILE soft X-ray imaging Open
The Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) is a Chinese Academy of Science (CAS) and European Space Agency (ESA) collaborative science mission. Primary goals are investigating the dynamic response of the Earth’s ma…
View article: Properties of a Supercritical Quasi-perpendicular Interplanetary Shock Propagating in the Terrestrial Foreshock Region
Properties of a Supercritical Quasi-perpendicular Interplanetary Shock Propagating in the Terrestrial Foreshock Region Open
We investigate the properties of an interplanetary (IP) shock ( M f = 2.1, θ = 80°) that was detected by Wind on 1999 September 12 and was magnetically connected to the terrestrial bow shock. Key results are obtained concerning how the IP …
View article: Electron Acceleration by Moderate-Mach-number Low-β Shocks: Particle-in-Cell Simulations
Electron Acceleration by Moderate-Mach-number Low-β Shocks: Particle-in-Cell Simulations Open
Particle acceleration is ubiquitous at shock waves, occurring on scales ranging from supernova remnants in the universe to coronal-mass-ejection-driven shocks and planetary bow shocks in the heliosphere. The most promising mechanism respon…
View article: Interactions between Two Deformable Droplets in Tandem Fixed in a Gas Flow Field of a Gas Well
Interactions between Two Deformable Droplets in Tandem Fixed in a Gas Flow Field of a Gas Well Open
Knowing the droplet-deformation conditions, the droplet-breakup conditions, and the drag force in the interaction between two droplets with a high Reynolds number is of importance for tracking droplet movement in the annular flow field of …
View article: Nonlinear Wave–Wave Coupling Related to Whistler-mode and Electron Bernstein Waves Observed by the Parker Solar Probe
Nonlinear Wave–Wave Coupling Related to Whistler-mode and Electron Bernstein Waves Observed by the Parker Solar Probe Open
We report nonlinear wave–wave coupling related to whistler-mode or electron Bernstein waves in the near-Sun slow solar wind with Parker Solar Probe (PSP) data. Prominent plasma wave power enhancements usually exist near the electron gyrofr…
View article: Microinstabilities and plasma waves at Near-Sun Solar Wind collisionless Shocks: Predictions for PSP and SO
Microinstabilities and plasma waves at Near-Sun Solar Wind collisionless Shocks: Predictions for PSP and SO Open
<p><span>Microinstabilities and waves excited at perpendicular interplanetary shocks in the near-Sun solar wind are investigated by full particle-in-cell simulations. By analyzing the dispersion relation of fluctuating field co…
View article: Properties of A Supercritical Quasi-Perpendicular Interplanetary Shock Propagating in Super-Alfv&#233;nic Solar Wind: from MHD to Kinetic Scales
Properties of A Supercritical Quasi-Perpendicular Interplanetary Shock Propagating in Super-Alfvénic Solar Wind: from MHD to Kinetic Scales Open
<p>We investigate the properties of an interplanetary shock (M<sub>A</sub>=3.0, θ<sub>Bn</sub>=80°) propagating in Super-Alfvénic solar wind observed on September 12<sup>th,<…
View article: MMS Direct Observations of Kinetic-scale Shock Self-reformation
MMS Direct Observations of Kinetic-scale Shock Self-reformation Open
Studies of shocks have long suggested that a shock can undergo cyclical self-reformation on a timescale of ion cyclotron period. This process has been proposed as a primary mechanism for energy dissipation and energetic particle accelerati…
View article: PIC Simulations of Microinstabilities and Waves at Near-Sun Solar Wind Perpendicular Shocks: Predictions for Parker Solar Probe and Solar Orbiter
PIC Simulations of Microinstabilities and Waves at Near-Sun Solar Wind Perpendicular Shocks: Predictions for Parker Solar Probe and Solar Orbiter Open
Microinstabilities and waves excited at moderate-Mach-number perpendicular shocks in the near-Sun solar wind are investigated by full particle-in-cell simulations. By analyzing the dispersion relation of fluctuating field components direct…
View article: PIC simulations of microinstabilities and waves at near-Sun solar wind perpendicular shocks: Predictions for Parker Solar Probe and Solar Orbiter
PIC simulations of microinstabilities and waves at near-Sun solar wind perpendicular shocks: Predictions for Parker Solar Probe and Solar Orbiter Open
Microinstabilities and waves excited at moderate-Mach-number perpendicular shocks in the near-Sun solar wind are investigated by full particle-in-cell (PIC) simulations. By analyzing the dispersion relation of fluctuating field components …