Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307..826k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 15, 1986, p. 826-837. NASA-Navy-supported research.
Astronomy and Astrophysics
Astrophysics
3
Magnetic Flux, Magnetohydrodynamic Stability, Plasma Currents, Solar Flux, Lumped Parameter Systems, Magnetic Field Reconnection, Particle Motion, Plasma Density, Plasma Temperature, Time Response
Scientific paper
Emerging magnetic flux plays an important role in the development of active regions on the sun and, perhaps, in the subsequent activation of flares. However, the energy input that produces preflare brightenings and flares probably does not come from the flux emergence itself but from one or more associated energy-releasing processes - likely candidates include magnetic reconnection and various current-driven plasma micro-instabilities. Here the interplay between the changing physical characteristics of an emerging magnetic-flux tube and the onset and evolution of a representative 'bump-on-tail' plasma current-driven instability is investigated. The microinstability heats the ambient material, thus changing the macroscopic characteristics of the plasma in which the model and current-driven instability occurs.
Boris Jay P.
Karpen Judith T.
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