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Solar Abundances as Derived from Solar Energetic Particles

Stone, E. C. (1989) Solar Abundances as Derived from Solar Energetic Particles. In: Cosmic abundances of matter. AIP Conference Proceedings. No.183. American Institute of Physics , Melville, NY, pp. 72-90.

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Recent studies have shown that there are well defined average abundances of heavy (Z≳2) solar energetic particles (SEPs), with variations in the acceleration and propagation producing a systematic flare‐to‐flare fractionation that depends on the charge per unit mass of the ion. Correcting the average SEP abundances for the fractionation yields SEP‐derived coronal abundances for 20 elements. Higher resolution SEP studies have also provided isotopic abundances for 5 elements. SEP‐derived abundances indicate that elements with high first ionization potentials (≳10 eV) are depleted in the corona relative to the photosphere and provide new information on the solar abundance of C and ^(22)Ne. Future SEP observations offer the prospect of a significant reduction of the uncertainties in solar elemental and isotopic abundances.

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Stone, E. C.0000-0002-2010-5462
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Additional Information:© 1989 American Institute of Physics. Published online 01 March 1989. I appreciate T. L. Garrard's help in preparing this manuscript. This work was supported in part by NASA under contract NAS7-918 and grants NGR 05-002-160 and NAG5-722.
Group:Space Radiation Laboratory
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NASANGR 05-002-160
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Space Radiation Laboratory1988-10
Series Name:AIP Conference Proceedings
Issue or Number:183
Record Number:CaltechAUTHORS:20140501-105012914
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45409
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Deposited On:01 May 2014 22:23
Last Modified:10 Nov 2021 17:03

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