Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh11d1139p&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SH11D-1139
Physics
2118 Energetic Particles, Solar, 2129 Interplanetary Dust, 2152 Pickup Ions, 7513 Coronal Mass Ejections, 7519 Flares
Scientific paper
Energetic particle events are typically associated with solar activity, i.e. flares and coronal mass ejections (CMEs). Observationally, relativistic particles arrive at 1 AU within an hour of such activity. In contrast, suprathermal ions, that form the link between the highly energized ions and their seed population, take up to two days to reach Earth. Inner source pickup ions, a population of singly ionized particles believed to originate from the interaction of the solar wind with small dust grains, are formed in the inner heliosphere at and beyond ten solar radii. Fast CME shocks must encounter inner source pickup ions within three hours of propagation. We discuss implications of suprathermal ion composition on near-Sun acceleration processes and seed populations. A critical test is the contribution of inner source pickup ions in the readily identified suprathermal ion onsets at 1 AU.
Gloeckler George
Kunow Horst
McComas David John
Posner Arik
Schwadron Nathan A.
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