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Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath
Yao, S. T.1,2; Shi, Q. Q.1; Yao, Z. H.3,4; Li, J. X.5; Yue, C.5; Tao, X.6; Degeling, A. W.1; Zong, Q. G.7; Wang, X. G.8; Tian, A. M.1; Russell, C. T.9; Zhou, X. Z.7; Guo, R. L.10; Rae, I. J.3; Fu, H. S.11; Zhang, H.12,13; Li, L.8; Le Contel, O.14; Torbert, R. B.15; Ergun, R. E.16; Lindqvist, P. -A.17; Pollock, C. J.18; Giles, B. L.18
2019-01-28
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume46Issue:2Pages:523-533
AbstractKinetic scale magnetic dips (KSMDs), with a significant depression in magnetic field strength, and scale length close to and less than one proton gyroradius, were reported in the turbulent plasmas both in recent observation and numerical simulation studies. These KSMDs likely play important roles in energy conversion and dissipation. In this study, we present observations of the KSMDs that are labeled whistler mode waves, electrostatic solitary waves, and electron cyclotron waves in the magnetosheath. The observations suggest that electron temperature anisotropy or beams within KSMD structures provide free energy to generate these waves. In addition, the occurrence rates of the waves are higher in the center of the magnetic dips than at their edges, implying that the KSMDs might be the origin of various kinds of waves. We suggest that the KSMDs could provide favorable conditions for the generation of waves and transfer energy to the waves in turbulent magnetosheath plasmas. Plain Language Summary The Earth's magnetosheath is a turbulent plasma environment where energy conversion, particle acceleration, and mass and momentum transport take place. Many of these key processes involve kinetic-scale physics. However, in-depth studies from previous missions are limited by their lower spacecraft data resolution. The recent Magnetospheric Multiscale (MMS) mission provides us with a large amount of high-temporal cadence data for studying kinetic-scale physics in the magnetosheath. In this study, we report whistler mode waves, electrostatic solitary waves and electron cyclotron waves within kinetic-scale magnetic dips (KSMDs) that can be generated in the turbulent magnetosheath. These waves could be excited by electron temperature anisotropy or beams. As is well known, plasma waves are important processes in converting energy, accelerating and scattering electrons and ions, and modifying the distributions of charged particles. If plasma instabilities develop within the KSMDs, the resulting waves could absorb free energy from plasma particles and may propagate out of the KSMDs. Thus, our discoveries could significantly advance the understanding of energy conversion and dissipation for kinetic-scale turbulence. This study provides a new reference not only for observations in space physics but also for related basic plasma theories and numerical simulations.
DOI10.1029/2018GL080696
Funding OrganizationCNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai ; CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai ; CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai ; CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai
WOS KeywordELECTRON SOLITARY WAVES ; WHISTLER-MODE WAVES ; SOLAR-WIND ; PLASMA-WAVES ; THEMIS OBSERVATIONS ; ALFVEN WAVES ; HOLES ; DIFFUSION ; TURBULENCE ; DISCONTINUITIES
Language英语
Funding ProjectCNES ; CNRS-INSIS ; CNRS-INSU ; National Natural Science Foundation of China[41774153] ; National Natural Science Foundation of China[41574157] ; National Natural Science Foundation of China[41628402] ; National Natural Science Foundation of China[41674165] ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai[2017WHWLJH08]
Funding OrganizationCNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai ; CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai ; CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai ; CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000458607400001
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90686
Collection地球与行星物理院重点实验室
Corresponding AuthorShi, Q. Q.
Affiliation1.Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China
2.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China
3.UCL, Mullard Space Sci Lab, London, England
4.Univ Liege, STAR Inst, Lab Phys Atmospher & Planetaire, Liege, Belgium
5.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA
6.Univ Sci & Technol China, Dept Geophys & Planetary Sci, CAS Key Lab Geospace Environm, Hefei, Anhui, Peoples R China
7.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China
8.Harbin Inst Technol, Dept Phys, Harbin, Heilongjiang, Peoples R China
9.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA
10.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
11.Beihang Univ, Sch Space & Environm, Beijing, Peoples R China
12.Univ Alaska Fairbanks, Phys Dept, Fairbanks, AK USA
13.Univ Alaska Fairbanks, Geophys Inst, Fairbanks, AK 99775 USA
14.Univ Paris Sud, Sorbonne Univ, Lab Phys Plasmas, Observ Paris,Ecole Polytech,CNRS,UMR7648, Paris, France
15.Univ New Hampshire, Dept Phys, Durham, NH 03824 USA
16.Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA
17.Royal Inst Technol, Stockholm, Sweden
18.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
Recommended Citation
GB/T 7714
Yao, S. T.,Shi, Q. Q.,Yao, Z. H.,et al. Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(2):523-533.
APA Yao, S. T..,Shi, Q. Q..,Yao, Z. H..,Li, J. X..,Yue, C..,...&Giles, B. L..(2019).Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath.GEOPHYSICAL RESEARCH LETTERS,46(2),523-533.
MLA Yao, S. T.,et al."Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath".GEOPHYSICAL RESEARCH LETTERS 46.2(2019):523-533.
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