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Coronal Abundances of Neon and Magnesium Isotopes from Solar Energetic Particles

Selesnick, R. S. and Cummings, A. C. and Cummings, J. R. and Leske, R. A. and Mewaldt, R. A. and Stone, E. C. and von Rosenvinge, T. T. (1993) Coronal Abundances of Neon and Magnesium Isotopes from Solar Energetic Particles. Astrophysical Journal Letters, 418 (1). L45-L48. ISSN 2041-8205. doi:10.1086/187112.

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The relative abundances of 22 to 70 Me V nucleon^(-l) Ne and Mg isotopes from two large flare-associated solar energetic particle (SEP) events in 1992 October and November, are determined from data taken by the Mass Spectrometer Telescope on the polar-orbiting SAMPEX satellite. After converting the measured abundances to coronal values, the average ^(22)Ne/^(20)Ne ratio is 0.076 ± 0.008, consistent with the solar wind value of 0.073 but significantly less than that of previous SEP measurements, in which the abundance of ^(22)Ne was substantially enhanced. The average ^(26)Mg/^(24)Mg ratio is 0.152 ± 0.012, consistent with both previous SEP and other solar system measurements.

Item Type:Article
Related URLs:
URLURL TypeDescription
Cummings, A. C.0000-0002-3840-7696
Leske, R. A.0000-0002-0156-2414
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Additional Information:© American Astronomical Society. Provided by the NASA Astrophysics Data System. Received 1993 July 14; accepted 1993 September 1. This work was supported by NASA under contract NAS 5-30704 and grant NAGW-1919.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANAS 5-30704
Non-Subject Keywords:Sun: abundances - Sun: corona - Sun: flares
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1993-28
Issue or Number:1
Record Number:CaltechAUTHORS:20140516-110810887
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45804
Deposited By: Deborah Miles
Deposited On:19 May 2014 16:30
Last Modified:10 Nov 2021 17:16

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