报告题目：Constraining energy release and transport processes in solar flares with X-ray and bolometric observations

　　报告人：Alexander Warmuth 博士

　　摘要：Energy release and transport processes in solar flares are constrained by means of a comprehensive characterization of the physical parameters of both the thermal plasma and the accelerated nonthermal electrons, using X-ray observations from RHESSI and GOES. This is complemented by bolometric radiated energies as measured by SORCE and SOHO/VIRGO. We find evidence for two plasma components: a cooler component (10-20 MK) evaporated from the chromosphere, and an additional hotter component (>20 MK) which is more consistent with direct in-situ heating of coronal plasma. The potentially very significant role of conductive energy losses is investigated. Finally, the relative contribution of electron acceleration versus direct heating (i.e., the acceleration efficiency) is studied as a function of flare importance.

　　时间：10月26日（周五）10:00-11:00

　　地点：3号楼302会议室

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紫金山天文台学术委员会