Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221.1068c&link_type=abstract
Astrophysical Journal, Part 1, vol. 221, May 1, 1978, p. 1068-1083, 1085-1087. NASA-NSF-ERDA-supported research.
Astronomy and Astrophysics
Astrophysics
60
Magnetic Effects, Magnetohydrodynamics, Solar Flares, Solar Magnetic Field, Stellar Models, Astronomical Models, Field Aligned Currents, Gamma Rays, Magnetic Flux, Nuclear Fusion, Solar Cosmic Rays, Solar X-Rays
Scientific paper
The energy of solar flares is derived from the magnetic energy of fields convected to the sun's surface and subsequently converted to heat and energetic particles within the chromosphere. The circumstances of this conversion in most current models is magnetic flux annihilation at a neutral sheet. An analysis is conducted of the constraints of flux annihilation. It is shown that the present evidence of solar cosmic rays, X-rays, gamma-rays, and total energy suggests a choice of annihilation not at a neutral point, but by an enhanced dissipation of a field-aligned current. The field configuration is related both to its origin and to the extensive theory and laboratory experiments concerned with this configuration in magnetic fusion. The magnetic field model is applied to the August 4 flare. It is shown how the plasma heating in the annihilation region balanced by thermal conduction leads to a plasma temperature of about 20 million deg K.
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