Beam-return current systems in solar flares

Details Beam-return current systems in solar flares Beam-return current systems in solar flares

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...280..448s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 280, May 1, 1984, p. 448-456. Navy-NASA-supported research.

Astronomy and Astrophysics

Astrophysics

34

Magnetohydrodynamics, Plasma Currents, Plasma Heating, Solar Flares, Magnetic Induction, Resistance Heating, Solar Magnetic Field, Solar X-Rays

Scientific paper

It is demonstrated that the common assumption made in solar flare beam transport theory that the beam-accompanied return current is purely electrostatically driven is incorrect, and that the return current is both electrostatically and inductively driven, in accordance with Lenz's law, with the inductive effects dominating for times greater than a few plasma periods. In addition, it is shown that a beam can only exist in a solar plasma for a finite time which is much smaller than the inductive return current dissipation time. The importance of accounting for the role of the acceleration mechanism in forming the beam is discussed. In addition, the role of return current driven anomalous resistivity and its subsequent anomalous Joule heating during the flare process is elucidated.

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