Observations of kinetic-size magnetic holes in the magnetosheath
文献类型：期刊论文
| 作者 | Yao, S. T.1,2; Wang, X. G.3; Shi, Q. Q.1; Pitkanen, T.2; Hamrin, M.2; Yao, Z. H.4,5; Li, Z. Y.6; Ji, X. F.6; De Spiegeleer, A.2; Xiao, Y. C.1 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
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| 出版日期 | 2017-02-01 |
| 卷号 | 122期号:2页码:1990-2000 |
| ISSN号 | 2169-9380 |
| DOI | 10.1002/2016JA023858 |
| 文献子类 | Article |
| 英文摘要 | Magnetic holes (MHs), with a scale much greater than pi ( proton gyroradius), have been widely reported in various regions of space plasmas. On the other hand, kinetic-size magnetic holes (KSMHs), previously called small-size magnetic holes, with a scale of the order of magnitude of or less than.i have only been reported in the Earth's magnetospheric plasma sheet. In this study, we report such KSMHs in the magnetosheath whereby we use measurements from the Magnetospheric Multiscale mission, which provides three-dimensional (3-D) particle distribution measurements with a resolution much higher than previous missions. The MHs have been observed in a scale of 10-20 pe ( electron gyroradii) and lasted 0.1-0.3 s. Distinctive electron dynamics features are observed, while no substantial deviations in ion data are seen. It is found that at the 90 degrees pitch angle, the flux of electrons with energy 34-66 eV decreased, while for electrons of energy 109-1024 eV increased inside the MHs. We also find the electron flow vortex perpendicular to the magnetic field, a feature self-consistent with the magnetic depression. Moreover, the calculated current density is mainly contributed by the electron diamagnetic drift, and the electron vortex flow is the diamagnetic drift flow. The electron magnetohydrodynamics soliton is considered as a possible generation mechanism for the KSMHs with the scale size of 10-20 rho(e). |
| WOS关键词 | TRAVELING CONVECTION VORTICES ; DRIFT MIRROR INSTABILITY ; FINITE ELECTRON-TEMPERATURE ; SOLAR-WIND ; PLASMA SHEET ; MAGNETOSPHERIC MULTISCALE ; CLUSTER-C1 OBSERVATIONS ; LINEAR INSTABILITY ; FIELD OBSERVATIONS ; MODE STRUCTURES |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000397022900038 |
| 资助机构 | National Natural Science Foundation of China(41574157 ; European Union ; 41322031 ; 41628402) ; National Natural Science Foundation of China(41574157 ; European Union ; 41322031 ; 41628402) ; National Natural Science Foundation of China(41574157 ; European Union ; 41322031 ; 41628402) ; National Natural Science Foundation of China(41574157 ; European Union ; 41322031 ; 41628402) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/53032]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Shi, Q. Q. |
| 作者单位 | 1.Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China 2.Umea Univ, Dept Phys, Umea, Sweden 3.Harbin Inst Technol, Dept Phys, Harbin, Peoples R China 4.Univ Coll London, Mullard Space Sci Lab, Dorking, Surrey, England 5.Univ Liege, STAR Inst, Lab Phys Atmospher & Planetaire, Liege, Belgium 6.Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China 7.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China 8.Univ Alaska Fairbanks, Dept Phys, Fairbanks, AK USA 9.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA 10.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA |
| 推荐引用方式 GB/T 7714 | Yao, S. T.,Wang, X. G.,Shi, Q. Q.,et al. Observations of kinetic-size magnetic holes in the magnetosheath[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(2):1990-2000. |
| APA | Yao, S. T..,Wang, X. G..,Shi, Q. Q..,Pitkanen, T..,Hamrin, M..,...&Liu, J..(2017).Observations of kinetic-size magnetic holes in the magnetosheath.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(2),1990-2000. |
| MLA | Yao, S. T.,et al."Observations of kinetic-size magnetic holes in the magnetosheath".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.2(2017):1990-2000. |
入库方式： OAI收割
来源：地质与地球物理研究所
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