I. V. Zimovets, A. B. Struminsky
On the base of one particular long-duration solar event (LDE) of X1.2-class on 2003 October 26 it is shown that observable response of active region plasma (flux of soft X-ray emission, emission measure and temperature) to accelerated electrons can change drastically in time. This LDE is outstanding among others due to the presence of very strong "burst-on-tail" of non-thermal hard X-ray and microwave emissions about 90 min after its onset without significant response in the range of soft X-ray emission. Based on the spatially-resolved observations of the flare region a following interpretation of this phenomenon is proposed. During the "burst-on-tail" accelerated electrons were injected into magnetic loops of larger spatial scale than during the impulsive phase bursts. This was due to the natural for LDEs growth of the flaring loops. Therefore, precipitation of similar population of non-thermal electrons into footpoints of the larger-scale loops resulted in much smaller fluxes of soft X-ray emission, temperature and emission measure of plasma evaporated into their coronal volume.
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http://arxiv.org/abs/1205.3719
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