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Published 2009 | public
Book Section - Chapter Open

Time Dependent Composition in the December 2006 SEP Events

Abstract

Multipoint observations of He-rich solar energetic particle (SEP) events using instruments on the ACE and STEREO have been made over the period January 2007 to May 2009, during which the separation between the two STEREO spacecraft in heliolongitude increased from 0.5 to 95 . Relatively quiet conditions on the Sun allowed identification of probable source regions. In one event (4 November 2008), ions were detected at STEREOB and ACE and electrons at all three spacecraft. The longitudinal distributions of energetic particles from He-rich SEP events are discussed and compared with results from previous studies.

Additional Information

Copyright University of Łódź. Department of High Energy Astrophysics, 2010 This work was supported by NASA grants NAS5-03131, NNX08AI11G, and NAG5-6912 and NSF grant ATM04-54428.

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