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On the differences in element abundances of energetic ions from corotating events and from large solar eventsThe abundances of energetic ions accelerated from high-speed solar wind streams by shock waves formed at corotating interaction regions (CIRs) where high-speed streams overtake the lower-speed solar wind are examined. The observed element abundances appear to represent those of the high-speed solar wind, unmodified by the shock acceleration. These abundances, relative to those in the solar photosphere, are organized by the first ionization potential (FIP) of the ions in a way that is different from the FIP effect commonly used to describe differences between abundances in the solar photosphere and those in the solar corona, solar energetic particles (SEPs), and the low-speed solar wind. In contrast, the FIP effect of the ion abundances in the CIR events is characterized by a smaller amplitude of the differences between high-FIP and low-FIP ions and by elevated abundances of He, C, and S.
Document ID
19920030899
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Reames, D. V.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Richardson, I. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Barbier, L. M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 15, 2013
Publication Date
November 20, 1991
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 382
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
92A13523
Distribution Limits
Public
Copyright
Other

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