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Solar Coronal and Photospheric Abundances from Solar Energetic Particle Measurements

Breneman, H. H. and Stone, E. C. (1985) Solar Coronal and Photospheric Abundances from Solar Energetic Particle Measurements. Astrophysical Journal Letters, 299 (1). L57-L61. ISSN 2041-8205.

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We find that the ionic charge-to-mass ratio (Q/M) is the principal organizing parameter for the fractionation of solar energetic particles (SEPs) by acceleration and propagation processes and for flare-to-flare variability. Unfractionated coronal abundances for 20 elements with 6 ≤ Z ≤ 30 are derived by applying a single-parameter Q/M-dependent correction to the average SEP abundances, and unfractionated photospheric abundances are obtained by applying an additional correction based on first ionization potential.

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Stone, E. C.0000-0002-2010-5462
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Additional Information:© 1985 American Astronomical Society. Provided by the NASA Astrophysics Data System. We appreciate the contributions of R. E. Vogt and other CRS team members. This work has been supported in part by NASA under contract NAS7-918 and grant NGR 05-002-160.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANGR 05-002-160
Subject Keywords:cosmic rays: abundances - Sun: abundances - Sun: atmosphere - Sun: corona - Sun: flares
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Space Radiation Laboratory1985-23
Issue or Number:1
Record Number:CaltechAUTHORS:20140429-131342703
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45311
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Deposited On:30 Apr 2014 22:57
Last Modified:20 Feb 2020 14:33

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