Time Variations in Elemental Abundances in Solar Energetic Particle Events

Details Time Variations in Elemental Abundances in Solar Energetic Particle Events Time Variations in Elemental Abundances in Solar Energetic Particle Events

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh61b08v&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SH61B-08

Physics

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

Scientific paper

The abundances of elements from Helium to Nickel have now been observed in almost 30 different solar energetic particle events using the Solar Isotope Spectrometer on-board the Advanced Composition Explorer spacecraft. We report on substantial time variations of the observed abundances within events and from event to event. Understanding the causes of these variations is key to obtaining reliable solar elemental abundances and to understanding solar acceleration processes. We will attempt to relate the observed variations to the properties of the associated coronal mass ejections (CMEs) as observed by instruments on the SOHO spacecraft. We will also examine the dependence of peak particle intensities on CME speeds and on the CME starting locations at the sun.

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