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

被引：70

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：

中国国家自然科学基金; 中国博士后科学基金;

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.

引用

页数：5

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