中国科大地空学院“瀚海问天”日地空间物理前沿论坛讲座第44期-程鑫

报告人简介：

程鑫，南京大学天文与空间科学学院至诚特聘教授，2012年获南京大学天文学博士学位，曾在美国乔治梅森大学联合培养、在德国马普所做洪堡学者。主要研究兴趣为太阳爆发活动、磁重联物理、恒星磁活动等。主持国家青年科学基金项目（A类、B类）。曾获美国地球物理学会Basu奖、中国天文学会黄授书奖，亚太等离子体物理学会U40奖等。

摘要：

Magnetic reconnection is a fundamental physical process in various astrophysical, space, and laboratory environments. In the solar atmosphere, it is believed to play a key role in heating plasmas, accelerating particles, and driving the eruption of large-scale magnetic fields, giving rise to coronal mass ejections and flares. Moreover, it has long been proposed that magnetic reconnection is essentially coupled with turbulence either spontaneously or driven externally. My talk will first focus on recent high-resolution imaging observations of turbulent reconnection within flare current sheets and 3D null-fan systems, highlighting the features of plasmoids of different scales, fine structures of flare ribbons, intermittent outflow jets, et al. Then, I will briefly introduce the state-of-the-art 3D MHD simulations of turbulent reconnection with the purpose of understanding those observations and electron acceleration involved.