Dynamics of a flare current sheet. I - Diffusion thickening and estimated flare parameters

Details Dynamics of a flare current sheet. I - Diffusion thickening and estimated flare parameters Dynamics of a flare current sheet. I - Diffusion thickening and estimated flare parameters

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975sva....19..195p&link_type=abstract

(Astronomicheskii Zhurnal, vol. 52, Mar.-Apr. 1975, p. 316-325.) Soviet Astronomy, vol. 19, no. 2, 1975, p. 195-199. Translatio

Astronomy and Astrophysics

Astronomy

5

Astronomical Models, Current Sheets, Magnetic Field Configurations, Plasma Diffusion, Plasma Turbulence, Solar Flares, Galactic Nuclei, Quasars, Solar Flares, Stellar Mass Ejection, Velocity Distribution, X Ray Sources

Scientific paper

The process of magnetic-field dissipation in a current sheet of a stellar flare is analyzed. It is shown that due to plasma turbulence, field dissipation during flare activity must result from splitting of the current sheet and its subsequent diffusion thickening. The balance between the rate of such thickening and the rate of sheet compression due to the outflow of plasma through its ends is found to result in the formation of the steady equilibrium state of the current sheet. It is especially noted that the flow rate of the magnetic field into the plasma as well as the strength and duration of a flare's energy release are determined only by the parameters of the unperturbed plasma in the flare region. Appropriate values of a flare's major characteristics are estimated using this model of energy release. It is suggested that this model may be used to observe flare activity in such objects as the sun, UV Ceti-type stars, X-ray sources, galactic nuclei, and quasars.

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