Observations of Whistler Waves Correlated with Electron-scale Coherent Structures in the Magnetosheath Turbulent Plasma

被引：67
作者：
Huang, S. Y. [1 ]
Sahraoui, F. [2 ]
Yuan, Z. G. [1 ]
Le Contel, O. [2 ]
Breuillard, H. [2 ]
He, J. S. [3 ]
Zhao, J. S. [4 ]
Fu, H. S. [5 ]
Zhou, M. [6 ]
Deng, X. H. [6 ]
Wang, X. Y. [1 ]
Du, J. W. [1 ]
Yu, X. D. [1 ]
Wang, D. D. [1 ,7 ]
Pollock, C. J. [8 ]
Torbert, R. B. [9 ]
Burch, J. L. [10 ]
机构：
[1] 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] Beihang Univ, Sch Space & Environm, Beijing, Peoples R China
[6] Nanchang Univ, Inst Space Sci & Technol, Nanchang, Jiangxi, Peoples R China
[7] Helmholtz Ctr Potsdam GFZ German Res Ctr Geosci, Potsdam, Germany
[8] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[9] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA
[10] Southwest Res Inst, San Antonio, TX USA
来源：
ASTROPHYSICAL JOURNAL | 2018年 / 861卷 / 01期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
planets and satellites: magnetic fields; planets and satellites: physical evolution; plasmas; turbulence; waves; TERRESTRIAL MAGNETOSHEATH; MODE WAVES; MMS OBSERVATIONS; SOLAR-WIND; PROPAGATION; EMISSIONS; ORIGIN;
D O I：
10.3847/1538-4357/aac831
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A new type of electron-scale coherent structure, referred to as electron vortex magnetic holes, was identified recently in the Earth's magnetosheath turbulent plasma. These electron-scale magnetic holes are characterized by magnetic field strength depression, electron density enhancement, temperature and temperature anisotropy increase (a significant increase in perpendicular temperature and a decrease in parallel temperature), and an electron vortex formed by the trapped electrons. The strong increase of electron temperature indicates that these magnetic holes have a strong connection with the energization of electrons. Here, using high time resolution in situ measurements from the MMS mission, it is further shown that electron-scale whistler waves coexist with electron-scale magnetic holes. These whistler waves were found not propagating from remote regions, but generated locally due to electron temperature anisotropy (Te-perpendicular to/Te-parallel to) inside the magnetic holes. This study provides new insights into the electron-scale plasma dynamics in turbulent plasmas.
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