| Non-thermal
Event on Aug. 28, 1999 |
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| We
discovered sub-second-time-scale propagation |
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| of
non-thermal source by Nobeyama
Radioheliograph |
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| 1) ~100,000 km/sec ‘rapid’ propagation |
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| direct precipitation ? |
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| 2) ~10,000 km/sec ‘slow’ propagation |
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| diffusion of non-thermal
electrons ? |
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| 3) Spectrum of loop-top emission is harder than that |
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| of the footpoints. |
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| (Identification of thermal and
non-thermal emission) |
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