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Fractionation of solar energetic particles and solar wind according to first ionization potential

Mewaldt, R. A. and Cohen, C. M. S. and Leske, R. A. and Christian, E. R. and Cummings, A. C. and Stone, E. C. and von Rosenvinge, T. T. and Wiedenbeck, M. E. (2002) Fractionation of solar energetic particles and solar wind according to first ionization potential. Advances in Space Research, 30 (1). pp. 79-84. ISSN 0273-1177. http://resolver.caltech.edu/CaltechAUTHORS:20140826-110121697

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Abstract

Although it is well known that solar energetic particles are depleted in elements with first ionization potential (FIP) greater than ∼10 eV, it is less well known that the degree of FIP fractionation varies from event to event. Similar fractionation patterns and variations are observed in the solar wind, suggesting that these variations may have a common origin. We review evidence for the FIP-related fractionation of SEPs and compare it with FIP fractionation effects in the solar wind at 1 AU. On the basis of several significant differences between the solar wind and SEP compositions, we suggest that most solar energetic particles are not simply an accelerated sample of the average solar wind as observed at 1 AU; rather, solar particles and fast and slow solar wind appear to be distinct samples of coronal material with distinctly different FIP-fractionation patterns.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://www.sciencedirect.com/science/article/pii/S0273117702002636PublisherArticle
http://dx.doi.org/10.1016/S0273-1177(02)00263-6DOIArticle
ORCID:
AuthorORCID
Cohen, C. M. S.0000-0002-0978-8127
Additional Information:© 2002 COSPAR. Published by Elsevier Science Ltd. Available online 21 August 2002. This work was supported by NASA at the California Institute of Technology (under grant NAS5-6912), the Jet Propulsion Laboratory, and Goddard Space Flight Center.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASANAS5-6912
NASA/JPL/CaltechUNSPECIFIED
Goddard Space Flight CenterUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2000-13
Record Number:CaltechAUTHORS:20140826-110121697
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140826-110121697
Official Citation:R.A. Mewaldt, C.M.S. Cohen, R.A. Leske, E.R. Christian, A.C. Cummings, E.C. Stone, T.T. von Rosenvinge, M.E. Wiedenbeck, Fractionation of solar energetic particles and solar wind according to first ionization potential, Advances in Space Research, Volume 30, Issue 1, 2002, Pages 79-84, ISSN 0273-1177, http://dx.doi.org/10.1016/S0273-1177(02)00263-6. (http://www.sciencedirect.com/science/article/pii/S0273117702002636)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48909
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Aug 2014 19:54
Last Modified:12 Sep 2017 23:16

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