Results 21 to 30 of about 15,881 (262)
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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N-S Asymmetry and Solar Cycle Distribution of Superactive Regions from 1976 to 2017
Universe, 2022 There were 51 superactive regions (SARs) during solar cycles (SCs) 21–24. We divided the SARs into SARs1, which produced extreme space weather events including ≥X5.0 flares, ground level events (GLEs), and super geomagnetic storms (SGSs, Dst < −250 nT ...
Ming-Xian Zhao +2 more
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The Common Origin of High-energy Protons in Solar Energetic Particle Events and Sustained Gamma-Ray Emission from the Sun [PDF]
The Astrophysical Journal, 2021 Abstract We report that the number of >500 MeV protons (Ng ) inferred from sustained gamma-ray emission (SGRE) from the Sun is significantly correlated with that of protons propagating into space (N SEP) as solar energetic particles (SEPs). Under the shock paradigm for SGRE, shocks driven by coronal
N. Gopalswamy +4 more
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28 OCTOBER 2003 FLARE: HIGH-ENERGY GAMMA EMISSION, TYPE II RADIO EMISSION AND SOLAR PARTICLE OBSERVATIONS [PDF]
International Journal of Modern Physics A, 2005 The 28 October 2003 flare gave us the unique opportunity to compare the acceleration time of high-energy protons with the escaping time of those particles which have been measured onboard spacecraft and by neutron monitors network as GLE event. High-energy emission time scale and shock wave height and velocity time dependencies were also studied.
S. N. KUZNETSOV +10 more
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The Astrophysical Journal, 2023 Solar Orbiter's four in situ instruments have recorded numerous energetic electron events at heliocentric distances between 0.5 and 1 au. We analyze energetic electron fluxes, spectra, pitch-angle distributions, associated Langmuir waves, and type III ...
Camille Y. Lorfing +9 more
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67. Solar radio emission and the acceleration of magnetic-storm particles [PDF]
Symposium - International Astronomical Union, 1957 The shift of the emitted frequencies towards lower frequencies during a solar outburst is usually interpreted as due to a progressive rarefaction of the emitting gas. If one assumes that the emitted frequency is identical with the plasma frequency and furthermore that the density of the emitting plasma is similar to the density of the solar corona at ...
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Type II Radio Emission and Solar Particle Observations
, 2010 International Journal of Modern Physics A, Volume 20, Issue 29, pp. 6705-6707 (2005)
Kuznetsov, S. N. +11 more
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Observation of solar high energy gamma and X-ray emission and solar energetic particles
Journal of Physics: Conference Series, 2015 We considered 18 solar flares observed between June 2010 and July 2012, in which high energy >100 MeV γ-emission was registered by the Large Area Telescope (LAT) aboard FermiGRO. We examined for these γ-events soft X-ray observations by GOES, hard X-ray observations by the Anti-Coincidence Shield of the SPectrometer aboard INTEGRAL (ACS SPI) and the
Struminsky, Alexei, Gan, Weiqun
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Investigating the Origins of Two Extreme Solar Particle Events: Proton Source Profile and Associated Electromagnetic Emissions [PDF]
The Astrophysical Journal, 2017 Abstract We analyze the high-energy particle emission from the Sun in two extreme solar particle events in which protons are accelerated to relativistic energies and can cause a significant signal even in the ground-based particle detectors.
Leon Kocharov +15 more
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The Astrophysical Journal, 2023 Abstract Large solar eruptions are often associated with long-duration γ-ray emission extending well above 100 MeV. While this phenomenon is known to be caused by high-energy ions interacting with the solar atmosphere, the underlying dominant acceleration process remains under debate.
A. Bruno +4 more
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