The mean ionic charge of silicon in He-3-rich solar flares

Details The mean ionic charge of silicon in He-3-rich solar flares The mean ionic charge of silicon in He-3-rich solar flares

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...317..951l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 317, June 15, 1987, p. 951-955.

Astronomy and Astrophysics

Astrophysics

104

Helium Isotopes, Ion Charge, Silicon, Solar Flares, International Sun Earth Explorer 3, Iron, Solar Temperature

Scientific paper

The charge state of Si in solar flares with enhanced He-3 is investigated on the basis of measurements obtained at a sunward distance of about 230 earth radii by the ultralow-energy Z, E, and Q sensor of ISEE 3 during 1978-1979. The data are presented in tables and graphs and characterized. The charge is found to have a mean of about 14 and a 99-percent-confidence-level lower bound of 11.7, as compared to 11.0 + or - 0.3 for normal flare events. Also presented are corrections to the mean Fe charges reported by Klecker et al. (1984). Both mean charge states indicate a source temperature of about 10 million K and appear to be incompatible with the mechanism proposed by Fisk (1978) to explain He-3 enrichment.

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