Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh41a..06g&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SH41A-06
Physics
7513 Coronal Mass Ejections, 7534 Radio Emissions, 2118 Energetic Particles, Solar, 2139 Interplanetary Shocks
Scientific paper
We studied the association between solar proton events and white-light coronal mass ejections (CMEs) that occurred during the solar cycle 23 until November 2001. Each of the SEP events was associated with a large-scale primary CME, that were faster and wider than average CMEs. For most of the proton events, the primary CME overtakes one or more slower CMEs. In order to confirm this result, we examined the association and CME interaction and energetic proton events for all the fast (speed > 900 km~s-1) and wide (width > 60 deg) western hemispheric and halo CMEs during the study period. CMEs with energetic protons are 3 times more likely to be preceded by CME interaction than those without. We conclude that CME interaction is an important aspect of SEP acceleration. We infer that CME-driven shocks accelerate SEPs from the material of the preceding CMEs rather than from the quiet solar wind.
Gopalswamy Nat
Howard Russ A.
Kaiser Michael L.
Leske Richard A.
Michalek Gregory
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