Title: Origin and energization of solar explosions 

Speaker: 程鑫

Institute: 南京大学

Host: 冯思轶

Time: 2025.4.3 周四 14:30

Location: 物理楼 552

Abstract: The most powerful explosive phenomena that occur in the solar atmosphere and then propagate into interplanetary space are solar flares and coronal mass ejections (CMEs), which can give rise to severe impacts on the safety of high-tech human operations in space. To understand and predict these plasma explosions, we need to elucidate some fundamental but still puzzling questions, one of which concerns their origin and energization. I will present the discovery of pre-eruptive hot plasma channels causing solar eruptions and deliver a new MHD model to show how such pre-eruptive structures evolve toward the final eruption. I will also present new observations and simulations of 3D magnetic reconnection during the explosions to understand the underlying energy release mechanism.

Bio: 

程鑫，南京大学天文与空间科学学院教授，博导，副院长。2012年6月获南京大学天文学博士学位，2010年9月至2011年12月在美国乔治梅森大学联合培养，2019年2月至2022年7月为德国马普太阳系研究所“洪堡学者”。2017年获国家基金委优秀青年基金、江苏省杰出青年基金资助。主要研究方向为日冕物质抛射、磁场重联、太阳射电暴、恒星磁活动等。曾获江苏省优秀博士学位论文奖、美国地球物理学会“Basu Award”，中国天文学会“黄授书奖”，亚太等离子体物理学会“青年科学家奖”，连续入选爱思唯尔中国高被引学者。

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