Results 1 to 10 of about 196 (137)
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
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The Astrophysical JournalWe select and investigate six global solar extreme-ultraviolet (EUV) wave events using data from the Solar Dynamics Observatory and the Solar and Heliospheric Observatory.
Huidong Hu +5 more
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Particle Energization at a High Mach Number Perpendicular Shock: 1D Particle-in-cell Simulations
The Astrophysical Journal, 2023 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 front, and then ...
Yufei Hao +6 more
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The Efficiency of Electron Acceleration by ICME-driven Shocks
The Astrophysical Journal, 2023 We present a study of the efficiency of the acceleration of suprathermal electrons at collisionless shock waves driven by interplanetary coronal mass ejections (ICMEs), with the data analysis from both the spacecraft observations and test-particle ...
G. Qin, F.-J. Kong, S.-S. Wu
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Modeling Solar Energetic Neutral Atoms from Solar Flares and CME-driven Shocks
The Astrophysical Journal, 2023 We examine the production of energetic neutral atoms (ENAs) in solar flares and coronal mass ejection (CME)-driven shocks and their subsequent propagation to 1 au. Time profiles and fluence spectra of solar ENAs at 1 au are computed for two scenarios: (1)
Gang Li +7 more
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Solar Energetic Particle Events with Short and Long Onset Times
The Astrophysical Journal, 2023 Gradual solar energetic particle (SEP) events, usually attributed to shock waves driven by coronal mass ejections (CMEs), show a wide variety of temporal behaviors. For example, TO, the >10 MeV proton onset time with respect to the launch of the CME, has
Kosuke Kihara +3 more
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The Space Weather Context of the First Extreme Event of Solar Cycle 25, on 2022 September 5
The Astrophysical Journal, 2023 The coronal mass ejection (CME) on 2022 September 5 was the fastest CME yet observed and measured in situ by a spacecraft inside the corona (0.06 au for the Parker Solar Probe).
Evangelos Paouris +5 more
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Formation of the Injection Function of Solar Energetic Particles in Gradual Events
The Astrophysical Journal, 2023 We present a model for solar energetic particle injection into interplanetary space in gradual events, in which particle acceleration occurs in a limited region of the solar atmosphere.
Ivan Petukhov +2 more
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Simulation of the Solar Energetic Particle Event on 2020 May 29 Observed by Parker Solar Probe
The Astrophysical Journal, 2023 This paper presents a stochastic three-dimensional focused transport simulation of solar energetic particles (SEPs) produced by a data-driven coronal mass ejection (CME) shock propagating through a data-driven model of coronal and heliospheric magnetic ...
Lei Cheng +5 more
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The Astrophysical Journal, 2023 Ground level enhancements (GLEs) are extreme solar energetic particle (SEP) events that are of particular importance in space weather. In solar cycle 24, two GLEs were recorded on 2012 May 17 (GLE 71) and 2017 September 10 (GLE 72), respectively, using a
Wenlong Liu +8 more
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