Results 11 to 20 of about 94,994 (332)
A Perspective on Solar Energetic Particles
Frontiers in Astronomy and Space Sciences, 2022 The author has been fortunate to observe and participate in the rise of the field of solar energetic particles (SEPs), from the early abundance studies, to the contemporary paradigm of shock acceleration in large SEP events, and element abundance ...
Donald V. Reames
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DRIFT-INDUCED DECELERATION OF SOLAR ENERGETIC PARTICLES [PDF]
The Astrophysical Journal, 2015 We investigate the deceleration of solar energetic particles (SEPs) during their propagation from the Sun through interplanetary space, in the presence of weak to strong scattering in a Parker spiral configuration, using relativistic full orbit test ...
S. Dalla +3 more
semanticscholar +5 more sources
The acceleration and propagation of solar energetic particles [PDF]
Space Science Reviews, 2004 Solar Energetic Particles (SEPs) are an important component of Space Weather, including radiation hazard to humans and electronic equipment, and the ionisation of the Earth's atmosphere. We review the key observations of SEPs, our current understanding of their acceleration and transport, and discuss how this knowledge is incorporated within Space ...
S. Dalla
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On the Onset Delays of Solar Energetic Electrons and Protons: Evidence for a Common Accelerator
The Astrophysical Journal, 2023 The processes responsible for the acceleration of solar energetic particles (SEPs) are still not well understood, including whether SEP electrons and protons are accelerated by common or separate processes. Using a numerical particle transport model that
R. D. Strauss +4 more
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Dispersive Suprathermal Ion Events Observed by the Parker Solar Probe Mission
The Astrophysical Journal Letters, 2023 During Encounter 11, Parker Solar Probe observed a low-energy dispersive ions event of solar origin. The event was observed in the SPAN-I and IS⊙IS EPI-Lo sensors.
S. T. Alnussirat +17 more
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Analysis of SEP Events and Their Possible Precursors Based on the GSEP Catalog
The Astrophysical Journal Supplement Series, 2023 Solar energetic particle (SEP) events are one of the most crucial aspects of space weather. Their prediction depends on various factors including the source solar eruptions such as flares and coronal mass ejections (CMEs).
Sumanth Rotti, Petrus C. Martens
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Four Distinct Pathways to the Element Abundances in Solar Energetic Particles [PDF]
Space Science Reviews, 2019 Based upon recent evidence from abundance patterns of chemical elements in solar energetic particles (SEPs), and, ironically, the belated inclusion of H and He, we can distinguish four basic SEP populations: (1) SEP1—pure “impulsive” SEPs are produced by
D. Reames
semanticscholar +1 more source
From the Sun’s south to the north pole – Ulysses COSPIN/LET composition measurements at solar maximum [PDF]
Annales Geophysicae, 2003 Based on elemental abundance ratios derived from the Ulysses COSPIN/LET measurements, we classified the energetic particle populations during and after the socalled Fast Latitude Scan – the time period during which the Ulysses spacecraft traveled
M. Y. Hofer +3 more
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Journal of Radiological Protection, 2020 The lunar surface is directly and continuously exposed to Galactic Cosmic ray (GCR) particles and Solar energetic particles (SEPs) due to the lack of atmosphere and lunar magnetic field.
M. Naito +7 more
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From Sun to Interplanetary Space: What is the Pathlength of Solar Energetic Particles? [PDF]
Astrophysical Journal, 2019 Solar energetic particles (SEPs), accelerated during solar eruptions, propagate in turbulent solar wind before being observed with in situ instruments.
T. Laitinen, Silvia Dalla
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