Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsh32b..01r&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SH32B-01
Physics
7513 Coronal Mass Ejections, 7514 Energetic Particles (2114), 7519 Flares, 7554 X Rays, Gamma Rays, And Neutrinos
Scientific paper
The Sun is a prolific accelerator of electrons, protons and heavier ions. This acceleration occurs not only in the neighborhood of solar flares but also remotely by disturbances at high solar altitudes and in interplanetary space. Interplanetary particles have clear origins in the flare site and in interplanetary space. The distinction is made below 100 MeV through composition and charge state measurements. Particles that do not escape the flare site reveal themselves through X- and gamma ray emission. From gamma-ray and neutron emission we know that flare particles can attain relativistic energies. However, the origin of ground-level-event particles is still open to some debate. We review the nature of solar particle acceleration, what has been learned in the last decade and what we may learn from upcoming space missions.
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