Stimulated dissipation of magnetic discontinuities and the origin of solar flares |
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| Authors: | E N Parker |
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| Institution: | (1) Enrico Fermi Institute, Depts. of Physics and Astronomy, University of Chicago, Chicago, I, USA |
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| Abstract: | It is proposed that the principal cause of the confined solar flare is the dissipation of magnetic energy at the many small-scale pre-existing tangential dscontinuities in the local bipolar magnetic field. The discontinuities are a consequence of the continuous shuffling and intermixing of the footpoints of the bipolar field by the turbulent photospheric granules. The X-ray corona within the bipolar field is presumed to be a consequence of the continuing dissipation by reconnection at these discontinuities. A flare results when static deformation and/or internal agitation of the field stimulates the onset of rapid reconnection at the many small internal discontinuities. The discontinuities are partially exhausted by the flare, so that the post-flare X-ray emission of that particular loop is substantially below the pre-flare level for a period of some hours while the discontinuities are being rejuvenated.This work was supported in part by the National Aeronautics and Space Administration under NASA grant NGL 14-001-001. |
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