Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.152..287s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 152, no. 2, Feb. 1989, p. 287-311.
Astronomy and Astrophysics
Astrophysics
2
Plasma Turbulence, Solar Flares, Solitary Waves, Current Sheets, Electric Potential, Electrical Resistivity, Ion Acoustic Waves, Magnetohydrodynamic Stability, Particle Acceleration
Scientific paper
The occurrence of modulational instability in the current sheet of a solar flare is investigated. Special attention is given to the plasma microinstability in this sheet and its relation to the flare process. It is found that solitons or strong Langmuir turbulence are likely to occur in the diffusion region under solar flare conditions in which the electric resistivity could be enhanced by several orders of magnitude in the region, resulting in significant heating and stochastic acceleration of particles. A numerical example is used to demonstrate the transition of the magnetic field velocity and plasma density from the outer MHD region into the diffusive region and then back out again with the completion of the energy conversion process. This is all made possible by an increase in resistivity of four to five orders of magnitude over the classical value.
Dryer Murray
Song Mu-Tao
Wu Shi Tsan
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