Results 41 to 50 of about 94,994 (332)
Solar energetic particle drifts in the Parker spiral [PDF]
Journal of Geophysical Research: Space Physics, 2013 Drifts in the Parker spiral interplanetary magnetic field are known to be an important component in the propagation of galactic cosmic rays, while they are thought to be negligible for solar energetic particles (SEPs). As a result, they have so far been ignored in SEP propagation modeling and data analysis.
S. Dalla +3 more
openaire +4 more sources
Extreme Kinematics of the 2017 September 10 Solar Eruption and the Spectral Characteristics of the Associated Energetic Particles [PDF]
Astrophysical Journal, 2018 We report on the 2017 September 10 ground-level enhancement (GLE) event associated with a coronal mass ejection whose initial acceleration (∼9.1 km s−2) and initial speed (∼4300 km s−1) were among the highest observed in the Solar and Heliospheric ...
N. Gopalswamy +5 more
semanticscholar +1 more source
Space Weather, 2021 The Earth is constantly hit by energetic particles originating from galactic sources. The flux of these particles is altered by the magnetized solar wind in the heliosphere and the Earth's magnetic field.
A. S. Caprotti +4 more
doaj +1 more source
The Abundance of Helium in the Source Plasma of Solar Energetic Particles [PDF]
, 2017 Studies of patterns of abundance enhancements of elements, relative to solar coronal abundances, in large solar energetic-particle (SEP) events, and of their power-law dependence on the mass-to-charge ratio, A/Q$A/Q$, of the ions, have been used to ...
D. Reames
semanticscholar +1 more source
Anomalous Cosmic Rays and Heliospheric Energetic Particles
Space Science Reviews, 2022 We present a review of Anomalous Cosmic Rays (ACRs), including the history of their discovery and recent insights into their acceleration and transport in the heliosphere.
J. Giacalone +9 more
semanticscholar +1 more source
Elemental composition of solar energetic particles [PDF]
The Astrophysical Journal, 1984 The Low Energy Telescopes on the Voyager spacecraft have been used to measure the elemental composition (2< or =Z< or =28) and energy spectra (5--15 MeV per nucleon) on solar energetic particles (SEPs) in seven large flare events. Four flare events were selected which have SEP abundance ratios approximately independent of energy per nucleon.
Cook, W. R., Stone, E. C., Vogt, R. E.
openaire +4 more sources
The Astrophysical Journal, 2023 We report on the annual variation of quiet-time suprathermal ion composition for C through Fe using Advanced Composition Explorer (ACE)/Ultra-Low Energy Isotope Spectrometer data over the energy range 0.3–1.28 MeV nuc ^−1 from 1998 through 2019, covering
B. L. Alterman +4 more
doaj +1 more source
The Origin of Element Abundance Variations in Solar Energetic Particles [PDF]
, 2016 Abundance enhancements, during acceleration and transport in both gradual and impulsive solar energetic particle (SEP) events, vary approximately as power laws in the mass-to-charge ratio [A/Q$A/Q$] of the ions.
D. Reames
semanticscholar +1 more source
The composition of solar energetic particles
The Astrophysical Journal, 1986 The present measurements of elemental abundances in 15 large solar energetic particle events confirm the existence of two major effects: systematic differences between solar energetic particle abundances and photospheric abundances that are approximately correlated with first ionization potential (implying that the solar corona is the likely source ...
R. E. Mcguire +2 more
openaire +2 more sources
Space Climate and Solar Energetic Particles [PDF]
Iranian Journal of Astronomy and AstrophysicsIn this paper, we investigate the effect of solar corona magnetic activities during 11-year periods and energetic particles on global warming. According to atmospheric changes during the past years, the relationship between these two issues should be ...
Ehsan Tavabi +2 more
doaj +1 more source