Do all flares occur within a hierarchy of magnetic loops? |
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Authors: | RA Harrison GM Simnett |
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Institution: | Department of Space Research, University of Birmingham, B15 2TT, England |
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Abstract: | X-ray events observed by the Hard X-ray Imaging Spectrometer on the Solar Maximum Mission frequently indicate the following scenario for solar flares: The initial energy release occurs in a compact magnetic loop and during the impulsive phase may spread rapidly to involve a larger structure. In later phases the soft X-ray emission is from a much larger structure encompassing these initial features and, overlying them all is a huge loop with footpoints separated by up to several hundred thousand km. In the light of these observations, we believe a flare model involving a single magnetic loop is rarely, if ever appropriate. |
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