期刊
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
卷 122, 期 11, 页码 11442-11467出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017JA024535
关键词
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资金
- Austrian Fond zur Forderung der wissenschaftlichen Forschung (FWF) [P24740-N27, P28764-N27]
- Swedish Civil Contingencies Agency [171/16]
- CNES
- CNRS-INSIS
- CNRS-INSU
In this paper we use the full armament of the MMS (Magnetospheric Multiscale) spacecraft to study magnetic reconnection in the turbulent magnetosheath downstream of a quasi-parallel bow shock. Contrarily to the magnetopause and magnetotail cases, only a few observations of reconnection in the magnetosheath have been reported. The case study in this paper presents, for the first time, both fluid-scale and kinetic-scale signatures of an ongoing reconnection in the turbulent magnetosheath. The spacecraft are crossing the reconnection inflow and outflow regions and the ion diffusion region (IDR). Inside the reconnection outflows D shape ion distributions are observed. Inside the IDR mixing of ion populations, crescent-like velocity distributions and ion accelerations are observed. One of the spacecraft skims the outer region of the electron diffusion region, where parallel electric fields, energy dissipation/conversion, electron pressure tensor agyrotropy, electron temperature anisotropy, and electron accelerations are observed. Some of the difficulties of the observations of magnetic reconnection in turbulent plasma are also outlined.
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