Results 11 to 20 of about 612 (171)

Numerical Simulations of Particle Acceleration at Interplanetary Quasi-perpendicular Shocks [PDF]

open access: yesThe Astrophysical Journal, 2017
Abstract Using test particle simulations we study particle acceleration at highly perpendicular ( ) shocks under conditions of modeling magnetic turbulence. We adopt a backward-in-time method to solve the Newton–Lorentz equation using the observed shock parameters for quasi ...
F.-J. Kong, G. Qin, L.-H. Zhang
openaire   +2 more sources

The energetic storm particle events of 3 November 2021

open access: yesFrontiers in Astronomy and Space Sciences, 2023
Observations of energetic particles at interplanetary shocks are important to study acceleration mechanisms and their connection with magnetohydrodynamic turbulence.
Federica Chiappetta   +6 more
doaj   +1 more source

In Situ Observation of Electron Acceleration by a Double Layer in the Bow Shock

open access: yesThe Astrophysical Journal, 2023
The importance of the electric potential along the field direction in the acceleration of electrons in the quasi-perpendicular bow shock has been proposed.
C. M. Wang   +6 more
doaj   +1 more source

Irregular Proton Injection to High Energies at Interplanetary Shocks

open access: yesThe Astrophysical Journal Letters, 2023
How thermal particles are accelerated to suprathermal energies is an unsolved issue, crucial for many astrophysical systems. We report novel observations of irregular, dispersive enhancements of the suprathermal particle population upstream of a high ...
Domenico Trotta   +10 more
doaj   +1 more source

Magnetospheric response to solar wind forcing: ultra-low-frequency wave–particle interaction perspective [PDF]

open access: yesAnnales Geophysicae, 2022
Solar wind forcing, e.g., interplanetary shock and/or solar wind dynamic pressure pulses impacting Earth's magnetosphere, manifests many fundamental important space physics phenomena, including producing electromagnetic waves, plasma heating, and ...
Q. Zong, Q. Zong, Q. Zong
doaj   +1 more source

Radio Astronomical Tools for the Study of Solar Energetic Particles I. Correlations and Diagnostics of Impulsive Acceleration and Particle Propagation

open access: yesFrontiers in Astronomy and Space Sciences, 2021
Solar energetic particles (SEPs) are sporadically ejected from the Sun during flares and coronal mass ejections. They are of major astrophysical interest, because the proximity of the Sun allows for detailed multi-messenger studies.
Karl-Ludwig Klein
doaj   +1 more source

The physics of space weather/solar-terrestrial physics (STP): what we know now and what the current and future challenges are [PDF]

open access: yesNonlinear Processes in Geophysics, 2020
Major geomagnetic storms are caused by unusually intense solar wind southward magnetic fields that impinge upon the Earth's magnetosphere (Dungey, 1961). How can we predict the occurrence of future interplanetary events?
B. T. Tsurutani   +3 more
doaj   +1 more source

Shock Propagation and Associated Particle Acceleration in the Presence of Ambient Solar-Wind Turbulence

open access: yesFrontiers in Astronomy and Space Sciences, 2021
The topic of this review paper is on the influence of solar wind turbulence on shock propagation and its consequence on the acceleration and transport of energetic particles at shocks.
Fan Guo   +3 more
doaj   +1 more source

Nonlinear Interaction of Low-frequency Alfvén Waves and Ions

open access: yesThe Astrophysical Journal, 2023
The interaction between Alfvén waves and particles is a critical phenomenon in space and laboratory plasmas, and it has been observed that low-frequency Alfvén waves can accelerate and heat ions through subharmonic resonant interactions.
Xianshu Wu   +4 more
doaj   +1 more source

Magnetic-reconnection-driven Turbulence and Turbulent Reconnection Acceleration

open access: yesThe Astrophysical Journal, 2023
This paper employs an MHD-PIC method to perform numerical simulations of magnetic-reconnection-driven turbulence and turbulent reconnection acceleration of particles.
Shi-Min Liang   +3 more
doaj   +1 more source

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