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A statistical study of kinetic-size magnetic holes in turbulent magnetosheath: MMS observations
Huang, S. Y.1; Du, J. W.1; Sahraoui, F.2; Yuan, Z. G.1; He, J. S.3; Zhao, J. S.4; Le Contel, O.2; Breuillard, H.2; Wang, D. D.1; Yu, X. D.1; Deng, X. H.5; Fu, H. S.6; Zhou, M.7; Pollock, C. J.8; Torbert, R. B.9; Russell, C. T.10; Burch, J. L.11
2017-08-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN2169-9380
Volume122Issue:8Pages:8577-8588
Abstract

Kinetic-size magnetic holes (KSMHs) in the turbulent magnetosheath are statistically investigated using high time resolution data from the Magnetospheric Multiscale mission. The KSMHs with short duration (i.e., < 0.5 s) have their cross section smaller than the ion gyroradius. Superposed epoch analysis of all events reveals that an increase in the electron density and total temperature significantly increases (resp. decrease) the electron perpendicular (resp. parallel) temperature and an electron vortex inside KSMHs. Electron fluxes at similar to 90 degrees pitch angles with selective energies increase in the KSMHs are trapped inside KSMHs and form the electron vortex due to their collective motion. All these features are consistent with the electron vortex magnetic holes obtained in 2-D and 3-D particle-in-cell simulations, indicating that the observed KSMHs seem to be best explained as electron vortex magnetic holes. It is furthermore shown that KSMHs are likely to heat and accelerate the electrons. Plain Language Summary A nonlinear energy cascade in magnetized turbulent plasmas leads to the formation of different coherent structures which are thought to play an important role in dissipating energy and transporting particles. This study statistically investigate one new type of coherent structure, named electron vortex magnetic hole, used by Magnetospheric Multiscale data. It reveals the common features of this structure, including an increase in the electron density and total temperature, significantly increase (resp. decrease) the electron perpendicular (resp. parallel) temperature and an electron vortex inside these holes. The increase of electron temperature inside the holes indicates that these holes are likely to heat and accelerate the electrons. This gives new clue for energy dissipation in turbulent plasmas.

Keywordkinetic-size magnetic hole electron vortex mangetosheath turbulent plasma electron acceleration heating
DOI10.1002/2017JA024415
WOS KeywordPLASMA SHEET ; TERRESTRIAL MAGNETOSHEATH ; MAGNETOSPHERIC MULTISCALE ; MIRROR INSTABILITY ; WAVES ; CLUSTER
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000411788800049
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22734
Collection中国科学院紫金山天文台
Corresponding AuthorHuang, S. Y.
Affiliation1.Wuhan Univ, Sch Elect Informat, Wuhan, Hubei, Peoples R China
2.UPMC, Ecole Polytech, CNRS, Lab Phys Plasmas, Palaiseau, France
3.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
5.Nanchang Univ, Inst Space Sci & Technol, Nanchang, Jiangxi, Peoples R China
6.Beihang Univ, Sch Space & Environm, Beijing, Peoples R China
7.Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA
8.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
9.Univ New Hampshire, Dept Phys, Durham, NH 03824 USA
10.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA
11.Southwest Res Inst, San Antonio, TX USA
Recommended Citation
GB/T 7714
Huang, S. Y.,Du, J. W.,Sahraoui, F.,et al. A statistical study of kinetic-size magnetic holes in turbulent magnetosheath: MMS observations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(8):8577-8588.
APA Huang, S. Y..,Du, J. W..,Sahraoui, F..,Yuan, Z. G..,He, J. S..,...&Burch, J. L..(2017).A statistical study of kinetic-size magnetic holes in turbulent magnetosheath: MMS observations.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(8),8577-8588.
MLA Huang, S. Y.,et al."A statistical study of kinetic-size magnetic holes in turbulent magnetosheath: MMS observations".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.8(2017):8577-8588.
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