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6月20日 Magnetospheric Multiscale study of Magnetic reconnection in the Earth's magnetosphere

  报告题目:Magnetospheric Multiscale study of Magnetic reconnection in the Earth's magnetosphere 

  报告人:李文亚 (中科院空间中心,博士) 

  报告人简介:2009年毕业于中国科学技术大学空间物理系,获得理学学士学位;2014年毕业于中国科学院大学,获得空间物理博士学位。20147月进入中国科学院国家空间科学中心空间天气学国家重点实验室工作至今,201510月至20179月,在瑞典空间物理研究所访问。主要研究方向为太阳风-磁层相互作用过程中的跨尺度物理过程,包括磁场重联的电子扩散区、冷等离子体在磁场重联中的作用、重联中的动理学波动和磁层顶Kelvin-Helmholtz不稳定的磁流体和动力学过程等。 

  报告摘要:NASA's magnetospheric multiscale (MMS) mission aims to discover the electron-scale physics of magnetic reconnection, which is a dominant mechanism for eruptive processes in space plasma environment. The mission was launch on March 12th, 2015, and the high-resolution observations of MMS provide the unique opportunity to analyze the magnetic reconnection during the solar wind-magnetosphere coupling process. Types of agyrotropic electron distribution functions are resolved around the electron diffusion regions of dayside magnetopause and nightside magnetotail reconnection. The kinetic waves driven by crescent-shaped electron distribution functions can scatter and heat electrons around EDRs. MMS confirms that cold plasmas of ionospheric origin modify the Hall physics at the separatrix. Also, MMS observes the cold-ion diffusion region around X line, cold-ion jets in the exhaust, and kinetic waves driven by cold plasmas. MMS discovers the reconnection due to large-scale Kelvin-Helmholtz waves at the dayside magnetopause. 

  报告时间:2019620日,星期四, 上午10:30 

  报告地点:紫金山天文台仙林园区2号楼311会议室 

  联系人:郝宇飞

欢迎大家参加! 

紫金山天文台学术委员会 

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