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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Observations of an Electron-Cold Ion Component Reconnection at the Edge of an Ion-Scale Antiparallel Reconnection at the Dayside Magnetopause
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Observations of an Electron-Cold Ion Component Reconnection at the Edge of an Ion-Scale Antiparallel Reconnection at the Dayside Magnetopause

机译:观察Electron-Cold离子的组件重新连接Ion-Scale的边缘在的光面反平行的重新连接磁层

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摘要

Solar wind parameters play a dominant role in reconnection rate, which controls the solar wind-magnetosphere coupling efficiency at Earth's magnetopause. Besides, low-energy ions from the ionosphere, frequently detected on the magnetospheric side of the magnetopause, also affect magnetic reconnection. However, the specific role of low-energy ions in reconnection is still an open question under active discussion. In the present work, we report in situ observations of a multiscale, multi-type magnetopause reconnection in the presence of low-energy ions using NASA's Magnetospheric Multiscale data on September 11, 2015. This study divides ions into cold (10-500 eV) and hot (500-30,000 eV) populations. The observations can be interpreted as a secondary reconnection dominated by electrons and cold ions (mainEly in XY_(GSE) plane) located at the edge of an ion-scale reconnection (mainEly in XZ_(GSE) plane). This analysis demonstrates a dominant role of cold ions in the secondary reconnection without hot ions' response. Cold ions and electrons are accelerated and heated by the secondary process. The case study provides observational evidence for the simultaneous operation of antiparallel and component reconnection. Our results imply that the pre-accelerated and heated cold ions and electrons in the secondary reconnection may participate in the primary ion-scale reconnection affecting the solar windmagnetopause coupling and the complicated magnetic field topology could affect the reconnection rate.
机译:太阳风参数中发挥主导作用重新连接率,控制太阳能在地球的wind-magnetosphere耦合效率磁层。电离层,经常检测到磁层的磁性层的一边影响磁重联。特定角色的低能离子重新连接仍然是一个悬而未决的问题在活跃讨论。原位观测的多尺度、多类型磁重联的存在使用美国宇航局的磁性层的低能离子2015年9月11日,多尺度数据。离子分为冷(10 - 500 eV)和热(500 - 30000 eV)的人口。被视为次要重新连接由电子和冷离子(缅因州XY_ (GSE)飞机)位于边缘的一个ion-scale重新连接(缅因州XZ_ (GSE)飞机)。在二级重新连接冷离子的作用没有热离子的反应。电子加速和加热二级过程。同时观测证据反平行的和组件的操作重新连接。离子和预加热和冷电子在二级重新连接参与的主要ion-scale重新连接影响太阳能windmagnetopause耦合和复杂的磁场拓扑结构影响重联率。

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  • 来源
    《Journal of Geophysical Research, A. Space Physics: JGR》 |2021年第10期|e2021JA029390-1-e2021JA029390-15|共15页
  • 作者单位

    Fusion Simulation Center, State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China;

    Geophysical Institute, University of Alaska, Fairbanks, AK, USA;

    Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, USADeutsches Elektronen Synchrotron (DESY), Zeuthen, GermanyLESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, Meudon, FranceSchool of Earth and Space Sciences, Peking University, Beijing, ChinaDepartment of Physics, Harbin Institute of Technology, Harbin, ChinaShandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, ChinaCAS Key Laboratory of Geoscience Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, ChinaDepartment of Physics, University of Alberta, Edmonton, AB, CanadaDenali Scientific, Fairbanks, AK, USANASA Goddard Space Flight Center, Greenbelt, MD, USA;

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  • 正文语种 英语
  • 中图分类
  • 关键词

    Ions; magnetopause; LOW ENERGYAntiparallelEdge of a figure or solidsimultaneous operationCOLDCommon ColdWINDING PARAMETERS;

    机译:离子;磁层;低ENERGYAntiparallelEdge图或solidsimultaneous operationCOLDCommonColdWINDING参数;
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