Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma

S. Y. Huang; F. Sahraoui; Z. G. Yuan; J. S. He; J. S. Zhao; O. Le Contel; X. H. Deng; M. Zhou; H. S. Fu; Q. Q. Shi; B. Lavraud; Y. Pang; J. Yang; D. D. Wang; H. M. Li; X. D. Yu; C. J. Pollock; B. L. Giles; R. B. Torbert; C. T. Russell; K. A. Goodrich; D. J. Gershman; T. E. Moore; R. E. Ergun; Y. V. Khotyaintsev; P. A. Lindqvist; R. J. Strangeway; W. Magnes; K. Bromund; H. Leinweber; F. Plaschke; B. J. Anderson; J. L. Burch

doi:10.3847/2041-8213/aa5f50

Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma

S. Y. Huang
, F. Sahraoui
, Z. G. Yuan
, J. S. He
, J. S. Zhao
, O. Le Contel
, X. H. Deng
, M. Zhou
, H. S. Fu
, Q. Q. Shi
, B. Lavraud
, Y. Pang
, J. Yang
, D. D. Wang
, H. M. Li
, X. D. Yu
, C. J. Pollock
, B. L. Giles
, R. B. Torbert
, C. T. Russell

K. A. Goodrich, D. J. Gershman, T. E. Moore, R. E. Ergun, Y. V. Khotyaintsev, P. A. Lindqvist, R. J. Strangeway, W. Magnes, K. Bromund, H. Leinweber, F. Plaschke, B. J. Anderson, J. L. Burch

School of Space and Earth Sciences

Wuhan University
CNRS-Ecole Polytechnique-UPMC
Peking University
CAS - Purple Mountain Observatory
Nanchang University
University of California at Los Angeles
Shandong University
Institute de Recherche en Astrophysique et Planétologie
CNRS
NASA Goddard Space Flight Center
University of New Hampshire
University of Colorado Boulder
Box 537
KTH Royal Institute of Technology
Austrian Academy of Sciences
Johns Hopkins University Applied Physics Laboratory
Southwest Research Institute

Research output: Contribution to journal › Article › peer-review

119 Scopus citations

Abstract

We report on the observations of an electron vortex magnetic hole corresponding to a new type of coherent structure in the turbulent magnetosheath plasma using the Magnetospheric Multiscale mission data. The magnetic hole is characterized by a magnetic depression, a density peak, a total electron temperature increase (with a parallel temperature decrease but a perpendicular temperature increase), and strong currents carried by the electrons. The current has a dip in the core region and a peak in the outer region of the magnetic hole. The estimated size of the magnetic hole is about 0.23 ρ_i (∼30 ρ_e) in the quasi-circular cross-section perpendicular to its axis, where ρ_i and ρ_e are respectively the proton and electron gyroradius. There are no clear enhancements seen in high-energy electron fluxes. However, there is an enhancement in the perpendicular electron fluxes at 90° pitch angle inside the magnetic hole, implying that the electrons are trapped within it. The variations of the electron velocity components V_em and V_en suggest that an electron vortex is formed by trapping electrons inside the magnetic hole in the cross-section in the M-N plane. These observations demonstrate the existence of a new type of coherent structures behaving as an electron vortex magnetic hole in turbulent space plasmas as predicted by recent kinetic simulations.

Original language	English
Article number	L27
Journal	Astrophysical Journal Letters
Volume	836
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/aa5f50
State	Published - 20 Feb 2017

Keywords

Earth
planets and satellites: magnetic fields
planets and satellites: terrestrial planets
plasmas
turbulence

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10.3847/2041-8213/aa5f50

Cite this

Huang, S. Y., Sahraoui, F., Yuan, Z. G., He, J. S., Zhao, J. S., Le Contel, O., Deng, X. H., Zhou, M., Fu, H. S., Shi, Q. Q., Lavraud, B., Pang, Y., Yang, J., Wang, D. D., Li, H. M., Yu, X. D., Pollock, C. J., Giles, B. L., Torbert, R. B., ... Burch, J. L. (2017). Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma. Astrophysical Journal Letters, 836(2), Article L27. https://doi.org/10.3847/2041-8213/aa5f50

@article{9eddbce2f79f407c8ba76d9bfec27c4c,

title = "Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma",

abstract = "We report on the observations of an electron vortex magnetic hole corresponding to a new type of coherent structure in the turbulent magnetosheath plasma using the Magnetospheric Multiscale mission data. The magnetic hole is characterized by a magnetic depression, a density peak, a total electron temperature increase (with a parallel temperature decrease but a perpendicular temperature increase), and strong currents carried by the electrons. The current has a dip in the core region and a peak in the outer region of the magnetic hole. The estimated size of the magnetic hole is about 0.23 ρi (∼30 ρe) in the quasi-circular cross-section perpendicular to its axis, where ρi and ρe are respectively the proton and electron gyroradius. There are no clear enhancements seen in high-energy electron fluxes. However, there is an enhancement in the perpendicular electron fluxes at 90° pitch angle inside the magnetic hole, implying that the electrons are trapped within it. The variations of the electron velocity components Vem and Ven suggest that an electron vortex is formed by trapping electrons inside the magnetic hole in the cross-section in the M-N plane. These observations demonstrate the existence of a new type of coherent structures behaving as an electron vortex magnetic hole in turbulent space plasmas as predicted by recent kinetic simulations.",

keywords = "Earth, planets and satellites: magnetic fields, planets and satellites: terrestrial planets, plasmas, turbulence",

author = "Huang, \{S. Y.\} and F. Sahraoui and Yuan, \{Z. G.\} and He, \{J. S.\} and Zhao, \{J. S.\} and \{Le Contel\}, O. and Deng, \{X. H.\} and M. Zhou and Fu, \{H. S.\} and Shi, \{Q. Q.\} and B. Lavraud and Y. Pang and J. Yang and Wang, \{D. D.\} and Li, \{H. M.\} and Yu, \{X. D.\} and Pollock, \{C. J.\} and Giles, \{B. L.\} and Torbert, \{R. B.\} and Russell, \{C. T.\} and Goodrich, \{K. A.\} and Gershman, \{D. J.\} and Moore, \{T. E.\} and Ergun, \{R. E.\} and Khotyaintsev, \{Y. V.\} and Lindqvist, \{P. A.\} and Strangeway, \{R. J.\} and W. Magnes and K. Bromund and H. Leinweber and F. Plaschke and Anderson, \{B. J.\} and Burch, \{J. L.\}",

year = "2017",

month = feb,

day = "20",

doi = "10.3847/2041-8213/aa5f50",

language = "英语",

volume = "836",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "2",

}

Huang, SY, Sahraoui, F, Yuan, ZG, He, JS, Zhao, JS, Le Contel, O, Deng, XH, Zhou, M, Fu, HS, Shi, QQ, Lavraud, B, Pang, Y, Yang, J, Wang, DD, Li, HM, Yu, XD, Pollock, CJ, Giles, BL, Torbert, RB, Russell, CT, Goodrich, KA, Gershman, DJ, Moore, TE, Ergun, RE, Khotyaintsev, YV, Lindqvist, PA, Strangeway, RJ, Magnes, W, Bromund, K, Leinweber, H, Plaschke, F, Anderson, BJ & Burch, JL 2017, 'Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma', Astrophysical Journal Letters, vol. 836, no. 2, L27. https://doi.org/10.3847/2041-8213/aa5f50

TY - JOUR

T1 - Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma

AU - Huang, S. Y.

AU - Sahraoui, F.

AU - Yuan, Z. G.

AU - He, J. S.

AU - Zhao, J. S.

AU - Le Contel, O.

AU - Deng, X. H.

AU - Zhou, M.

AU - Fu, H. S.

AU - Shi, Q. Q.

AU - Lavraud, B.

AU - Pang, Y.

AU - Yang, J.

AU - Wang, D. D.

AU - Li, H. M.

AU - Yu, X. D.

AU - Pollock, C. J.

AU - Giles, B. L.

AU - Torbert, R. B.

AU - Russell, C. T.

AU - Goodrich, K. A.

AU - Gershman, D. J.

AU - Moore, T. E.

AU - Ergun, R. E.

AU - Khotyaintsev, Y. V.

AU - Lindqvist, P. A.

AU - Strangeway, R. J.

AU - Magnes, W.

AU - Bromund, K.

AU - Leinweber, H.

AU - Plaschke, F.

AU - Anderson, B. J.

AU - Burch, J. L.

PY - 2017/2/20

Y1 - 2017/2/20

N2 - We report on the observations of an electron vortex magnetic hole corresponding to a new type of coherent structure in the turbulent magnetosheath plasma using the Magnetospheric Multiscale mission data. The magnetic hole is characterized by a magnetic depression, a density peak, a total electron temperature increase (with a parallel temperature decrease but a perpendicular temperature increase), and strong currents carried by the electrons. The current has a dip in the core region and a peak in the outer region of the magnetic hole. The estimated size of the magnetic hole is about 0.23 ρi (∼30 ρe) in the quasi-circular cross-section perpendicular to its axis, where ρi and ρe are respectively the proton and electron gyroradius. There are no clear enhancements seen in high-energy electron fluxes. However, there is an enhancement in the perpendicular electron fluxes at 90° pitch angle inside the magnetic hole, implying that the electrons are trapped within it. The variations of the electron velocity components Vem and Ven suggest that an electron vortex is formed by trapping electrons inside the magnetic hole in the cross-section in the M-N plane. These observations demonstrate the existence of a new type of coherent structures behaving as an electron vortex magnetic hole in turbulent space plasmas as predicted by recent kinetic simulations.

AB - We report on the observations of an electron vortex magnetic hole corresponding to a new type of coherent structure in the turbulent magnetosheath plasma using the Magnetospheric Multiscale mission data. The magnetic hole is characterized by a magnetic depression, a density peak, a total electron temperature increase (with a parallel temperature decrease but a perpendicular temperature increase), and strong currents carried by the electrons. The current has a dip in the core region and a peak in the outer region of the magnetic hole. The estimated size of the magnetic hole is about 0.23 ρi (∼30 ρe) in the quasi-circular cross-section perpendicular to its axis, where ρi and ρe are respectively the proton and electron gyroradius. There are no clear enhancements seen in high-energy electron fluxes. However, there is an enhancement in the perpendicular electron fluxes at 90° pitch angle inside the magnetic hole, implying that the electrons are trapped within it. The variations of the electron velocity components Vem and Ven suggest that an electron vortex is formed by trapping electrons inside the magnetic hole in the cross-section in the M-N plane. These observations demonstrate the existence of a new type of coherent structures behaving as an electron vortex magnetic hole in turbulent space plasmas as predicted by recent kinetic simulations.

KW - Earth

KW - planets and satellites: magnetic fields

KW - planets and satellites: terrestrial planets

KW - plasmas

KW - turbulence

UR - https://www.scopus.com/pages/publications/85014407410

U2 - 10.3847/2041-8213/aa5f50

DO - 10.3847/2041-8213/aa5f50

M3 - 文章

AN - SCOPUS:85014407410

SN - 2041-8205

VL - 836

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L27

ER -

Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma

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Keywords

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