Interacting CMEs and Solar Energetic Particles

Details Interacting CMEs and Solar Energetic Particles Interacting CMEs and Solar Energetic Particles

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsh12a0735g&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SH12A-0735

Physics

1

7513 Coronal Mass Ejections, 7514 Energetic Particles (2114), 7519 Flares, 7851 Shock Waves

Scientific paper

We examined the solar sources of a set of large solar energetic particle (SEP) events with mixed (impulsive + gradual) abundance signatures. The SEP events were detected by the Solar Isotope Spectrometer (SIS) on board the Advanced Composition Explorer (ACE) spacecraft. For each of the SEP events, we identified a "primary" coronal mass ejection (CME), detected by the Solar and Heliospheric observatory (SOHO). Then we examined a set of CMEs preceding the primary CME, potentially interacting with the primary CME in the near-Sun interplanetary medium. Twenty events from a list of 27 recently compiled von Rosenvinge et al. (Proc. ICRC 2001, p. 3136) overlapped with SOHO observations. Preliminary results indicate that a large majority of the primary CMEs were preceded by slower CMEs, suggesting that CME interaction may result in abundance enhancements in the source material. Research supported by NASA and AFOSR.

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