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Solar Coronal and Photospheric Abundances from Solar Energetic Particle Measurements

Breneman, H. and Stone, E. C. (1985) Solar Coronal and Photospheric Abundances from Solar Energetic Particle Measurements. In: Proceedings of the 19th International Cosmic Ray Conference. Vol.4. Goddard Space Flight Center , Green Belt, MD, pp. 217-220.

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Solar energetic particle (SEP) elemental abundance data from the Cosmic Ray Subsystem (CRS) aboard the Voyager 1 and 2 spacecraft (Breneman and Stone 1985} are used to derive unfractionated coronal and photospheric abundances for elements with 3 < Z < 30. We find that the ionic charge-to-mass ratio (Q/M) is the principal organizing parameter tor the fractionation of SEPs by acceleration and propagation processes and for fl.are-to-fl.are variability, making possible a single parameter Q/M-dependent correction to the average SEP abundances to obtain unfractionated coronal abundances. A further correction based on first ionization potential allows the determination of unfractionated photospheric abundances.

Item Type:Book Section
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Stone, E. C.0000-0002-2010-5462
Additional Information:© NASA/STI. Provided by the NASA Astrophysics Data-System. This work has been supported in part by the National Aeronautics and Space Administration under contract NAS7-916 and grant NGR 05-002-160.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANGR 05-002-160
Non-Subject Keywords:Abundance, Energetic Particles, Ion Distribution, Ionization, Photosphere, Radiation Measurement, Solar Atmosphere, Solar Corona, Solar Cosmic Rays, Charge Distribution, Chemical Composition, Ion Production Rates, Solar Cosmic Rays, Solar Flares, Stellar Structure, Voyager Project
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Space Radiation Laboratory1985-15
Record Number:CaltechAUTHORS:20140501-202056002
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45453
Deposited By: Joy Painter
Deposited On:02 May 2014 19:07
Last Modified:20 Feb 2020 14:33

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