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Perpendicular Current Reduction Caused by Cold Ions of Ionospheric Origin in Magnetic Reconnection at the Magnetopause: Particle-in-Cell Simulations and Spacecraft Observations
Toledo-Redondo, Sergio1; Dargent, Jérémy2,3; Aunai, Nicolas2; Lavraud, Benoit3; André, Mats4; Li, Wenya4,5; Giles, Barbara6; Lindqvist, Per-Arne7; Ergun, Robert E.8; Russell, Christopher T.9; Burch, James L.10
作者部门空间科学部
发表期刊Geophysical Research Letters
2018
DOI10.1029/2018GL079051
ISSN0094-8276
语种英语
摘要Cold ions of ionospheric origin are present throughout the Earth's magnetosphere, including the dayside magnetopause, where they modify the properties of magnetic reconnection, a major coupling mechanism at work between the magnetosheath and the magnetosphere. We present Magnetospheric MultiScale (MMS) spacecraft observations of the reconnecting magnetopause with different amounts of cold ions and show that their presence reduces the Hall term in the Ohm's law. Then, we compare two particle-in-cell simulations, with and without cold ions on the magnetospheric side. The cold ions remain magnetized inside the magnetospheric separatrix region, leading to the reduction of the perpendicular currents associated with the Hall effect. Moreover, this reduction is proportional to the relative number density of cold ions. And finally, the Hall electric field peak is reduced along the magnetospheric separatrix owing to cold ions. This should have an effect on energy conversion by reconnection from electromagnetic fields to kinetic energy of the particles. ©2018. American Geophysical Union. All Rights Reserved.
收录类别EI
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文献类型期刊论文
条目标识符http://ir.nssc.ac.cn/handle/122/6547
专题空间科学部
作者单位1.ESAC, European Space Agency, Madrid, Spain;
2.Laboratory of Plasma Physics - École Polytechnique, CNRS, UPMC, Université Paris-Sud, Paris, France;
3.Institut de Recherche en Astrophysique et Planétologie, Université de Toulouse, CNRS, UPS, CNES, Toulouse, France;
4.Swedish institute of Space Physics, Uppsala, Sweden;
5.State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China;
6.NASA Goddard Space Flight Center, Greenbelt; MD, United States;
7.Department of Space and Plasma Physics, Royal Institute of Technology, Stockholm, Sweden;
8.Laboratory of Atmospheric and Space Physics, University of Colorado Boulder, Boulder; CO, United States;
9.Department of Earth and Space Sciences, University of California, Los Angeles; CA, United States;
10.Southwest Research Institute, San Antonio; TX, United States
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Toledo-Redondo, Sergio,Dargent, Jérémy,Aunai, Nicolas,et al. Perpendicular Current Reduction Caused by Cold Ions of Ionospheric Origin in Magnetic Reconnection at the Magnetopause: Particle-in-Cell Simulations and Spacecraft Observations[J]. Geophysical Research Letters,2018.
APA Toledo-Redondo, Sergio.,Dargent, Jérémy.,Aunai, Nicolas.,Lavraud, Benoit.,André, Mats.,...&Burch, James L..(2018).Perpendicular Current Reduction Caused by Cold Ions of Ionospheric Origin in Magnetic Reconnection at the Magnetopause: Particle-in-Cell Simulations and Spacecraft Observations.Geophysical Research Letters.
MLA Toledo-Redondo, Sergio,et al."Perpendicular Current Reduction Caused by Cold Ions of Ionospheric Origin in Magnetic Reconnection at the Magnetopause: Particle-in-Cell Simulations and Spacecraft Observations".Geophysical Research Letters (2018).
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