Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh42a..04p&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SH42A-04
Physics
2101 Coronal Mass Ejections (7513), 2114 Energetic Particles (7514), 7514 Energetic Particles (2114), 7519 Flares
Scientific paper
The study of the onsets of solar relativistic electrons and energetic protons indicates a rather close relationship of the acceleration/release/transport mechanisms that dominate appearance of both at 1 AU. A list of the most severe proton events measured by GOES-8 in the years 1996-2002 served as a basis to derive the existing physical relationships via statistical and superposed epoch techniques. SOHO/COSTEP provides relativistic electron and <50 MeV proton observations at 1 AU. With a subset of solar particle events where the location of the associated flare on the Sun has been determined, it has been found that (1) relativistic electrons always arrive at 1 AU ahead of non-relativistic solar energetic ions; (2) the intensity increase of both, electrons and protons alike, depends on the magnetic connection, i.e. the magnetic longitude difference between the observer and the flare; and (3), as if coming from one source under near-identical propagation conditions, significant correlations exist that show that the combination of early electron intensity and - increase is indicative of the upcoming proton event. An empirical onset matrix has been established that links the two phenomena to the extent that electrons can effectively be utilized for predicting upcoming energetic proton intensities. This study will discuss these new findings in the context of previous results, and the relevance of onset analysis to be pursued from the inner heliosphere.
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