Pitch angle
View article: Self-similar Cosmic-Ray Transport in High-resolution Magnetohydrodynamic Turbulence
Self-similar Cosmic-Ray Transport in High-resolution Magnetohydrodynamic Turbulence Open
We study the propagation of cosmic rays (CRs) through a simulation of magnetohydrodynamic (MHD) turbulence at an unprecedented resolution of 10,240 3 . We drive turbulence that is subsonic and super-Alfvénic, characterized by δB rms / B 0 …
View article: Measuring Streamer Producing Thundercloud Electric Fields Using Radio Observations of Narrow Bipolar Events
Measuring Streamer Producing Thundercloud Electric Fields Using Radio Observations of Narrow Bipolar Events Open
The strong very high frequency (VHF) radiation from compact intra‐cloud discharges (CIDs) is attributed to streamers. An analytical model, taking altitude and applied electric field as input, is developed for effective representation of cu…
View article: Off-Equatorial Orbits around Magnetically Charged Black Holes
Off-Equatorial Orbits around Magnetically Charged Black Holes Open
We present a complete characterization of stable, off-equatorial circular orbits around magnetically charged black holes (MBHs). For a static, spherically symmetric MBH, we derive an exact analytic expression for the orbital latitude theta…
View article: Off-Equatorial Orbits around Magnetically Charged Black Holes
Off-Equatorial Orbits around Magnetically Charged Black Holes Open
We present a complete characterization of stable, off-equatorial circular orbits around magnetically charged black holes (MBHs). For a static, spherically symmetric MBH, we derive an exact analytic expression for the orbital latitude theta…
View article: Cassini CAPS‐ELS Observations of Low‐Energy Electron Beams Within Enceladus Mid‐Latitude Flux Tubes
Cassini CAPS‐ELS Observations of Low‐Energy Electron Beams Within Enceladus Mid‐Latitude Flux Tubes Open
The electrodynamic interaction between Saturn's magnetosphere and Enceladus accelerates electrons along magnetic field lines. These electrons propagate inside magnetic flux tubes connecting the moon to the giant planet, generating distinct…
View article: The fine structure of the mean magnetic field in M31
The fine structure of the mean magnetic field in M31 Open
To explore the spatial variations of the regular (mean) magnetic field of the Andromeda galaxy (M31), we use Fourier analysis in azimuthal angle along four rings in the galaxy’s plane. The Fourier coefficients give a quantitative measure o…
View article: On Improving the Fluid-Structure Interaction for Effective Energy Harvesting in Vertical Axis Wind Walls with Symmetrical Configuration
On Improving the Fluid-Structure Interaction for Effective Energy Harvesting in Vertical Axis Wind Walls with Symmetrical Configuration Open
The Wind Wall is an innovative mechanical system system comprising multiple Vertical Axis Wind Turbines (VAWTs) designed to efficiently harness wind energy and convert it into electrical power. This study investigates two critical aspects …
View article: Solar Orbiter Observations of a Self‐Consistent Ion‐Scale Magnetic Hole at 0.9AU
Solar Orbiter Observations of a Self‐Consistent Ion‐Scale Magnetic Hole at 0.9AU Open
Magnetic holes (MHs) are localized structures characterized by magnetic field depressions, accompanied by an enhancement in plasma thermal pressure. These pressure‐balanced structures span a broad range of scales in space, from fluid to ki…
View article: Source Dataset for "Revisiting Mars' Induced Magnetic Field and Clock Angle Departures under Real-Time Upstream Solar Wind Conditions"
Source Dataset for "Revisiting Mars' Induced Magnetic Field and Clock Angle Departures under Real-Time Upstream Solar Wind Conditions" Open
This dataset supports the manuscript by Cheng et al. (2025), “Revisiting Mars’ Induced Magnetic Field and Clock Angle Departures under Real-Time Upstream Solar Wind Conditions.” clock_diff: Clock-angle departures. inside_B: Downstream magn…
View article: Source Dataset for "Revisiting Mars' Induced Magnetic Field and Clock Angle Departures under Real-Time Upstream Solar Wind Conditions"
Source Dataset for "Revisiting Mars' Induced Magnetic Field and Clock Angle Departures under Real-Time Upstream Solar Wind Conditions" Open
This dataset supports the manuscript by Cheng et al. (2025), “Revisiting Mars’ Induced Magnetic Field and Clock Angle Departures under Real-Time Upstream Solar Wind Conditions.” clock_diff: Clock-angle departures. inside_B: Downstream magn…
View article: Source Dataset for "Revisiting Mars' Induced Magnetic Field and Clock Angle Departures under Real-Time Upstream Solar Wind Conditions"
Source Dataset for "Revisiting Mars' Induced Magnetic Field and Clock Angle Departures under Real-Time Upstream Solar Wind Conditions" Open
This dataset supports the manuscript by Cheng et al. (2025), “Revisiting Mars’ Induced Magnetic Field and Clock Angle Departures under Real-Time Upstream Solar Wind Conditions.” clock_diff: Clock-angle departures. inside_B: Downstream magn…
View article: Excitation of Whistler‐Mode Waves by an Electron Temperature Anisotropy in a Laboratory Plasma
Excitation of Whistler‐Mode Waves by an Electron Temperature Anisotropy in a Laboratory Plasma Open
Naturally occurring whistler‐mode waves in near‐Earth space play a crucial role in accelerating electrons to relativistic energies and scattering them in pitch angle, driving their precipitation into Earth's atmosphere. Here, we report on …
View article: Nonlinear excitation of energetic particle-induced geodesic acoustic mode via resonance overlap in CFQS
Nonlinear excitation of energetic particle-induced geodesic acoustic mode via resonance overlap in CFQS Open
Energetic particle (EP) driven instabilities are investigated in the Chinese First Quasi-axisymmetric Stellarator (CFQS) using the hybrid kinetic-magnetohydrodynamic code MEGA. EPs are described as the anisotropic slowing-down distribution…
View article: Wave Heating of Magnetotail Current Sheet Electrons at Mars
Wave Heating of Magnetotail Current Sheet Electrons at Mars Open
The Martian magnetotail current sheet serves as a critical pathway for ionospheric ion escape. Contrary to the conventional view that external magnetic pressure is balanced mainly by internal ion thermal pressure, we present novel observat…
View article: Competing mechanisms of radial and local diffusion in radiation belt electron dynamics during quiet-geomagnetic conditions
Competing mechanisms of radial and local diffusion in radiation belt electron dynamics during quiet-geomagnetic conditions Open
While previous investigations utilizing high-resolution satellite observations (e.g., Van Allen Probes) have elucidated the competition between radial diffusion and local wave-driven acceleration mechanisms during geomagnetic storms, the r…
View article: Validation of a Small UAV Dynamic Model Using CFD and Flight Test Data
Validation of a Small UAV Dynamic Model Using CFD and Flight Test Data Open
Fixed-wing Unmanned Aerial Vehicles (UAV) are increasingly utilized in various missions requiring stable and responsive performance. Accurate dynamic models are essential to ensure effective UAV control. This study presents the development…
View article: Electric Fields and Waves in the Venus Nightside Magnetosphere
Electric Fields and Waves in the Venus Nightside Magnetosphere Open
On November 6, 2024, the Parker Solar Probe flew past Venus to make the first accurate electric field measurement in the nightside Venusian magnetosphere. To achieve this result, the electric field antennas were current biased in a way nev…
View article: From shock to synchrotron: a mini-review on magnetic turbulence in supernova remnants
From shock to synchrotron: a mini-review on magnetic turbulence in supernova remnants Open
Magnetic turbulence plays a crucial role in confining charged particles near the shock front of Supernova Remnants, enabling them to reach energies up to hundreds of TeV through a process known as Diffusive Shock Acceleration (DSA). These …
View article: Research on Variable Baseline Coherent Angle Measurement Based on Nutation Scanning
Research on Variable Baseline Coherent Angle Measurement Based on Nutation Scanning Open
In inter-satellite laser communication systems, angular deviations between the boresights of terminals exert an impact on system performance, thereby imposing higher requirements on performance parameters such as the angle measurement accu…
View article: Simulations of Electron Interaction With Ionospheric Alfvén Resonator in the Jovian Aurora
Simulations of Electron Interaction With Ionospheric Alfvén Resonator in the Jovian Aurora Open
Recently, Lysak et al. (2021, https://doi.org/10.1029/2021ja029886 ) modeled the formation of the Ionospheric Alfvén Resonator (IAR) in Jovian aurora and demonstrated the generation of a small structure perpendicular to the magnetic field …
View article: Analytic Expressions for Atmospheric Elastic Collisional Scattering of Energetic Electrons in Magnetic Fields
Analytic Expressions for Atmospheric Elastic Collisional Scattering of Energetic Electrons in Magnetic Fields Open
Atmospheric collisions have always been recognized as a major direct loss mechanism for radiation belt electrons inside the loss cone. To quantify the impact of atmospheric collisions, previous studies mostly utilized stochastic Monte Carl…
View article: Quasilinear Wave‐Particle Analysis in the Source Region of Jovian Kilometric Radio Emission
Quasilinear Wave‐Particle Analysis in the Source Region of Jovian Kilometric Radio Emission Open
Jovian broadband kilometric emission (bKOM) is observed by the Juno spacecraft within a source region in the northern hemisphere near the equatorward edge of the auroral oval. A well‐developed upward loss cone is the free‐energy source of …
View article: Effects of Field Line Curvature Scattering on Energetic Proton Precipitation and Isotropy in the Magnetosphere
Effects of Field Line Curvature Scattering on Energetic Proton Precipitation and Isotropy in the Magnetosphere Open
While low‐altitude observations indicate that field line curvature (FLC) scattering produces isotropic precipitation of energetic protons, it remains unclear whether this mechanism also leads to a fully isotropic pitch angle distribution i…
View article: Spectral curvature and breaks from Fermi acceleration at oblique shocks
Spectral curvature and breaks from Fermi acceleration at oblique shocks Open
A major attraction of diffusive shock acceleration is the prediction of power-law spectra for energetic particle distributions. However, this property is not fundamental to the theory. We demonstrate that for planar shocks with an oblique …
View article: DESIGN AND ANALYSIS OF A VARIABLE PITCH PROPELLER UAV FOR VTOL APPLICATIONS
DESIGN AND ANALYSIS OF A VARIABLE PITCH PROPELLER UAV FOR VTOL APPLICATIONS Open
This research presents the design, optimization, and validation of a Variable Pitch Propeller (VPP)–enabled Vertical Take-Off and Landing (VTOL) Unmanned Aerial Vehicle (UAV) optimized for high-altitude operations. The proposed platform ad…
View article: Whistler‐Mode Chorus Wave Duct Propagation Caused by Ultralow Frequency Wave: Event Analysis and Ray‐Tracing Simulation
Whistler‐Mode Chorus Wave Duct Propagation Caused by Ultralow Frequency Wave: Event Analysis and Ray‐Tracing Simulation Open
This study presents observational evidence and ray‐tracing simulations demonstrating ultra‐low frequency (ULF) wave‐induced duct propagation of whistler‐mode waves. Cluster satellite observation reveals chorus propagating quasi‐parallelly …
View article: Study on the Effect of Pitch Angle on the Aerodynamic Characteristics of a Vertical Axis Wind Turbine with a Dimple-Gurney Flap
Study on the Effect of Pitch Angle on the Aerodynamic Characteristics of a Vertical Axis Wind Turbine with a Dimple-Gurney Flap Open
Vertical axis wind turbine (VAWT) faces aerodynamic efficiency challenges due to dynamic stall and flow separation. This study investigates the combined optimization of a toward-outside dimple-Gurney flap (TO-DGF) and pitch angle to enhanc…
View article: Cosmic-Ray Diffusion in the Turbulent Interstellar Medium: Effects of Mirror Diffusion and Pitch-angle Scattering
Cosmic-Ray Diffusion in the Turbulent Interstellar Medium: Effects of Mirror Diffusion and Pitch-angle Scattering Open
Cosmic rays (CRs) interact with turbulent magnetic fields in the interstellar medium (ISM), generating nonthermal emission. After many decades of studies, the theoretical understanding of their diffusion in the ISM continues to pose a chal…
View article: Electron Acceleration at Shock Ripples: Role of Pitch-angle Diffusion
Electron Acceleration at Shock Ripples: Role of Pitch-angle Diffusion Open
Suprathermal electrons are routinely observed in interplanetary space. At higher energies, there are in-situ evidences that shocks, both interplanetary shocks, often driven by fast coronal mass ejections, and terrestrial bow shocks, can ac…
View article: Estudio morfológico de la región circumnuclear y la estructura a gran escala de la galaxia NGC 4303
Estudio morfológico de la región circumnuclear y la estructura a gran escala de la galaxia NGC 4303 Open
We present a detailed morphological study of the Seyfert type 2 spiral galaxy NGC 4303 (M61), using the twodimensional fast Fourier transform (2DFFT) applied to multiband images (V, H, g, i). This analysis encompasses both the circumnuclea…