Article (Scientific journals)
Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath
Yao, S. T.; Shi, Q. Q.; Yao, Zhonghua et al.
2019In Geophysical Research Letters
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Keywords :
Atmospherics; Cyclotron radiation; Cyclotrons; Electron beams; Electron temperature; Electrostatics; Energy conversion; Free energy; Kinetics; Magnetism; Plasma turbulence; Plasma waves; Solitons; Electron cyclotron waves; Electron temperature anisotropy; Electrostatic solitary waves; Magnetic field strengths; Magnetosheath plasma; Numerical simulation studies; Whistler-mode waves; Magnetoplasma
Abstract :
[en] Kinetic-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. ©2018. American Geophysical Union. All Rights Reserved.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Yao, S. T.;  Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China, State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China
Shi, Q. Q.;  Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Yao, Zhonghua ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Li, J. X.;  Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
Yue, C.;  Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
Tao, X.;  CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Sciences, University of Science and Technology of China, Hefei, China
Degeling, A. W.;  Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Zong, Q. G.;  School of Earth and Space Sciences, Peking University, Beijing, China
Wang, X. G.;  Department of Physics, Harbin Institute of Technology, Harbin, China
Tian, A. M.;  Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Russell, C. T.;  Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, CA, United States
Zhou, X. Z.;  School of Earth and Space Sciences, Peking University, Beijing, China
Guo, R. L.;  Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
Rae, I. J.;  Mullard Space Science Laboratory, University College London, London, United Kingdom
Fu, H. S.;  School of Space and Environment, Beihang University, Beijing, China
Zhang, H
Li, L.;  Department of Physics, Harbin Institute of Technology, Harbin, China
Le Contel, O.;  Laboratoire de Physique des Plasmas, UMR7648, CNRS, Ecole Polytechnique, Sorbonne Universités, Université Paris-Sud, Observatoire de Paris, Paris, France
Torbert, R. B.;  Department of Physics, University of New Hampshire, Durham, NH, United States
Ergun, R. E.;  Department of Astrophysical and Planetary Sciences, University of Colorado Boulder, Boulder, CO, United States
Lindqvist, P.-A.;  Royal Institute of Technology, Stockholm, Sweden
Pollock, C. J.;  NASA Goddard Space Flight Center, Greenbelt, MD, United States
Giles, B. L.;  NASA Goddard Space Flight Center, Greenbelt, MD, United States
More authors (13 more) Less
Language :
English
Title :
Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath
Publication date :
2019
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
Blackwell Publishing Ltd
Peer reviewed :
Peer Reviewed verified by ORBi
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since 28 February 2019

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