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Published 2000 | Published
Book Section - Chapter Open

Observations of ^3He-rich Solar Energetic Particle Events with the Solar Isotope Spectrometer


Using ~4 MeV /nucleon solar energetic particle data from the Solar Isotope Spectrometer (SIS) on the Advanced Composition Explorer (ACE), we identify 60 ^3He-rich time periods longer than 5 hours in length. As many of these time periods do not have "classical" impulsive profiles, we classify each event as one of 4 event types (based on the morphology of the event). The time periods have been associated with solar events listed by the Space Environment Center and energetic electron events observed by the Electron, Proton, and Alpha Monitor (EPAM) on ACE. Only half of the events could be associated with an x-ray event and 63% with an electron event.

Additional Information

© 2000 Astronomical Society of the Pacific. We thank the EPAM team and the ACE Science Center for making the electron data available to us. This research was supported by NASA at the California Institute of Technology (under grant NAG5-6912), at the Jet Propulsion Laboratory, and at the Goddard Space Flight Center.

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January 13, 2024