Results 21 to 30 of about 1,276 (215)
Betatron Acceleration of Suprathermal Electrons within a Small-scale Flux Rope in the Solar Wind
The Astrophysical Journal Letters, 2023 A growing body of evidence from observations, theories, and simulations indicates that particles can be effectively accelerated in solar wind regions filled with dynamic small-scale flux ropes (FRs).
Weiduo Meng +9 more
doaj +1 more source
Acceleration of Solar Energetic Particles by the Shock of Interplanetary Coronal Mass Ejection [PDF]
The Astrophysical Journal, 2021 Abstract Interplanetary coronal mass ejection (ICME) shocks are known to accelerate particles and contribute significantly to solar energetic particle events. We have performed magnetohydrodynamic-particle in cell simulations of ICME shocks to understand the acceleration mechanism. These shocks vary in Alfvénic Mach numbers as well as in
Shanwlee Sow Mondal +3 more
openaire +2 more sources
Acceleration of Solar Wind Particles by Traveling Interplanetary Shocks [PDF]
The Astrophysical Journal, 2019 Abstract The acceleration of thermal solar wind (SW) protons at spherical interplanetary shocks driven by coronal mass ejections is investigated. The SW velocity distribution is represented using κ-functions, which are transformed in response to simulated shock transitions in the fixed-frame flow speed, plasma number density, and ...
P. L. Prinsloo +2 more
openaire +2 more sources
The Astrophysical Journal, 2023 We analyze periods with elevated >40 MeV proton intensities observed near Earth over a time span of 43 yr (1973–2016) that coincide with the passage of interplanetary (IP) shocks.
D. Lario +3 more
doaj +1 more source
The Astrophysical Journal Supplement Series, 2023 In an effort to develop computational tools for predicting radiation hazards from solar energetic particles (SEPs), we have created a data-driven physics-based particle transport model to calculate the injection, acceleration, and propagation of SEPs ...
Ming Zhang +7 more
doaj +1 more source
Additional acceleration of solar-wind particles in current sheets of the heliosphere [PDF]
, 2015 Particles of fast solar wind in the vicinity of the heliospheric current sheet (HCS) or in a front of interplanetary coronal mass ejections (ICMEs) often reveal very peculiar energy or velocity profiles, density distributions with double or triple peaks,
V. Zharkova +4 more
core +1 more source
Long-duration high-energy proton events observed by GOES in October 1989 [PDF]
Annales Geophysicae, 1998 We consider the prolonged injection of the high-energy (>10 MeV) protons during the three successive events observed by GOES in October 1989. We apply a solar-rotation-stereoscopy approach to study the injection of the accelerated particles from ...
A. Anttila +3 more
doaj +1 more source
The energetic storm particle events of 3 November 2021
Frontiers 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
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In Situ Observation of Electron Acceleration by a Double Layer in the Bow Shock
The 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
The 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