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Author Kahler, S. W.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ♦ ACCELERATION ♦ ASYMMETRY ♦ COMPARATIVE EVALUATIONS ♦ LIMBS ♦ MASS ♦ MEV RANGE ♦ SOLAR CORONA ♦ SOLAR PARTICLES ♦ SUN ♦ VELOCITY
Abstract Prompt onsets and short rise times to peak intensities Ip have been noted in a few solar energetic (E > 10 MeV) particle (SEP) events from far behind (≥25°) the west limb. We discuss 15 archival and recent examples of these prompt events, giving their source longitudes, onset and rise times, and associated coronal mass ejection (CME) speeds. Their timescales and CME speeds are not exceptional in comparison with a larger set of SEP events from behind the west limb. A further statistical comparison of observed timescales of SEP events from behind the west limb with events similarly poorly magnetically connected to the eastern hemisphere (EH) shows the longer timescales of the latter group. We interpret this result in terms of a difference between SEP production at parallel shocks on the eastern flanks of western backside events and at perpendicular shocks on the western flanks of EH events.
ISSN 0004637X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-03-10
Publisher Place United States
Journal Astrophysical Journal
Volume Number 819
Issue Number 2


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