THE IMPULSIVE X-RAY RESPONSE IN FLARE FOOTPOINTS

摘要

The impulsive phase of many solar flares well-observed by Yohkoh has been investigated using images from the SXT and HXT telescopes. A response to nonthermal electron beams in the individual flare footpoint has been localized and measured. Morphological features such as soft X-ray impulsive brightening and a hard X-ray footpoint emission source have been considered. A correlation between these features has been studied and their dependence on the energy spectrum of nonthermal electron beams has been discussed.