Four distinct pathways to the element abundances in solar energetic particles
DV Reames - Space Science Reviews, 2020 - Springer
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 …
energetic particles (SEPs), and, ironically, the belated inclusion of H and He, we can …
[HTML][HTML] Review and outlook of solar energetic particle measurements on multispacecraft missions
DV Reames - Frontiers in Astronomy and Space Sciences, 2023 - frontiersin.org
The earliest evidence of spatial distributions of solar energetic particles (SEPs) compared
events from many different source longitudes on the Sun, but the early Pioneers provided …
events from many different source longitudes on the Sun, but the early Pioneers provided …
Shock geometry, seed populations, and the origin of variable elemental composition at high energies in large gradual solar particle events
AJ Tylka, CMS Cohen, WF Dietrich… - The Astrophysical …, 2005 - iopscience.iop.org
Above a few tens of MeV per nucleon, large, gradual solar energetic particle (SEP) events
are highly variable in their spectral characteristics and elemental composition. The origin of …
are highly variable in their spectral characteristics and elemental composition. The origin of …
Evidence for a suprathermal seed population of heavy ions accelerated by interplanetary shocks near 1 AU
ABSTRACT We have surveyed the 0.1–10 MeV nucleon-1 elemental abundances at 72
interplanetary (IP) shocks observed by the Ultra–Low-Energy Isotope Spectrometer on …
interplanetary (IP) shocks observed by the Ultra–Low-Energy Isotope Spectrometer on …
A model for spectral and compositional variability at high energies in large, gradual solar particle events
AJ Tylka, MA Lee - The Astrophysical Journal, 2006 - iopscience.iop.org
Shocks driven by fast coronal mass ejections (CMEs) are generally believed to be the
dominant accelerators in large, gradual solar energetic particle (SEP) events. A key …
dominant accelerators in large, gradual solar energetic particle (SEP) events. A key …
Sixty years of element abundance measurements in solar energetic particles
DV Reames - Space Science Reviews, 2021 - Springer
Sixty years ago the first observation was published showing solar energetic particles (SEPs)
with a sampling of chemical elements with atomic numbers 6≤ Z≤ 18 above 40 MeV amu …
with a sampling of chemical elements with atomic numbers 6≤ Z≤ 18 above 40 MeV amu …
Solar energetic particles: spatial extent and implications of the H and He abundances
DV Reames - Space Science Reviews, 2022 - Springer
One of the earliest indicators of the importance of shock acceleration of solar energetic
particles (SEPs) was the broad spatial extent of the “gradual” SEP events produced as the …
particles (SEPs) was the broad spatial extent of the “gradual” SEP events produced as the …
Acceleration of suprathermal tails in the solar wind
LA Fisk, G Gloeckler - The Astrophysical Journal, 2008 - iopscience.iop.org
Suprathermal particles are ubiquitously present in the solar wind, with energies typically
from∼ 1 keV nucleon–1 to∼ a few MeV nucleon–1. Remarkably, the suprathermal particles …
from∼ 1 keV nucleon–1 to∼ a few MeV nucleon–1. Remarkably, the suprathermal particles …
Fifty Years of 3He-Rich Events
DV Reames - Frontiers in Astronomy and Space Sciences, 2021 - frontiersin.org
The early 1970s saw a new and surprising feature in the composition of solar energetic
particles (SEPs), resonant enhancements up to 10,000-fold in the ratio 3He/4He that could …
particles (SEPs), resonant enhancements up to 10,000-fold in the ratio 3He/4He that could …
[HTML][HTML] Element abundance and the physics of solar energetic particles
DV Reames - Frontiers in Astronomy and Space Sciences, 2024 - frontiersin.org
The acceleration and transport of solar energetic particles (SEPs) cause their abundance,
measured at a constant velocity, to be enhanced or suppressed as a function of the …
measured at a constant velocity, to be enhanced or suppressed as a function of the …