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

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 te...

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Veröffentlicht in:Astrophysical journal. Letters 2017-02, Vol.836 (2), p.L27-L27
Hauptverfasser: Huang, S. Y., Sahraoui, F., Yuan, Z. G., He, J. S., Zhao, J. S., Contel, O. Le, 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., Russell, C. T., Goodrich, K. A., Gershman, D. J., Moore, T. E., Ergun, R. E., Khotyaintsev, Y. V., Lindqvist, P.-A., Strangeway, R. J., Magnes, W., Bromund, K., Leinweber, H., Plaschke, F., Anderson, B. J., Burch, J. L.
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container_issue 2
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container_title Astrophysical journal. Letters
container_volume 836
creator Huang, S. Y.
Sahraoui, F.
Yuan, Z. G.
He, J. S.
Zhao, J. S.
Contel, O. Le
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.
Russell, C. T.
Goodrich, K. A.
Gershman, D. J.
Moore, T. E.
Ergun, R. E.
Khotyaintsev, Y. V.
Lindqvist, P.-A.
Strangeway, R. J.
Magnes, W.
Bromund, K.
Leinweber, H.
Plaschke, F.
Anderson, B. J.
Burch, J. L.
description 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 i (∼30 e) in the quasi-circular cross-section perpendicular to its axis, where i and 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 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.
doi_str_mv 10.3847/2041-8213/aa5f50
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Y. ; Sahraoui, F. ; Yuan, Z. G. ; He, J. S. ; Zhao, J. S. ; Contel, O. Le ; 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. ; Russell, C. T. ; Goodrich, K. A. ; Gershman, D. J. ; Moore, T. E. ; Ergun, R. E. ; Khotyaintsev, Y. V. ; Lindqvist, P.-A. ; Strangeway, R. J. ; Magnes, W. ; Bromund, K. ; Leinweber, H. ; Plaschke, F. ; Anderson, B. J. ; Burch, J. L.</creator><creatorcontrib>Huang, S. Y. ; Sahraoui, F. ; Yuan, Z. G. ; He, J. S. ; Zhao, J. S. ; Contel, O. Le ; 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. ; Russell, C. T. ; Goodrich, K. A. ; Gershman, D. J. ; Moore, T. E. ; Ergun, R. E. ; Khotyaintsev, Y. V. ; Lindqvist, P.-A. ; Strangeway, R. J. ; Magnes, W. ; Bromund, K. ; Leinweber, H. ; Plaschke, F. ; Anderson, B. J. ; Burch, J. L.</creatorcontrib><description>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 i (∼30 e) in the quasi-circular cross-section perpendicular to its axis, where i and 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 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.</description><identifier>ISSN: 2041-8205</identifier><identifier>ISSN: 2041-8213</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.3847/2041-8213/aa5f50</identifier><language>eng</language><publisher>United States: The American Astronomical Society</publisher><subject>Astrophysics ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; Coherence ; CROSS SECTIONS ; DENSITY ; Earth ; ELECTRON TEMPERATURE ; ELECTRONS ; Fluid flow ; Fluxes ; HOLES ; MAGNETIC FIELDS ; MAGNETOSHEATH ; Magnetospheres ; Physics ; PLANETS ; planets and satellites: magnetic fields ; planets and satellites: terrestrial planets ; PLASMA ; Plasma Physics ; plasmas ; PROTONS ; SATELLITES ; SIMULATION ; SPACE ; TRAPPING ; TURBULENCE ; Turbulent flow ; VARIATIONS ; VELOCITY ; Vortices</subject><ispartof>Astrophysical journal. Letters, 2017-02, Vol.836 (2), p.L27-L27</ispartof><rights>2017. The American Astronomical Society. 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Y.</creatorcontrib><creatorcontrib>Sahraoui, F.</creatorcontrib><creatorcontrib>Yuan, Z. G.</creatorcontrib><creatorcontrib>He, J. S.</creatorcontrib><creatorcontrib>Zhao, J. S.</creatorcontrib><creatorcontrib>Contel, O. Le</creatorcontrib><creatorcontrib>Deng, X. H.</creatorcontrib><creatorcontrib>Zhou, M.</creatorcontrib><creatorcontrib>Fu, H. S.</creatorcontrib><creatorcontrib>Shi, Q. Q.</creatorcontrib><creatorcontrib>Lavraud, B.</creatorcontrib><creatorcontrib>Pang, Y.</creatorcontrib><creatorcontrib>Yang, J.</creatorcontrib><creatorcontrib>Wang, D. D.</creatorcontrib><creatorcontrib>Li, H. M.</creatorcontrib><creatorcontrib>Yu, X. D.</creatorcontrib><creatorcontrib>Pollock, C. J.</creatorcontrib><creatorcontrib>Giles, B. L.</creatorcontrib><creatorcontrib>Torbert, R. B.</creatorcontrib><creatorcontrib>Russell, C. T.</creatorcontrib><creatorcontrib>Goodrich, K. A.</creatorcontrib><creatorcontrib>Gershman, D. J.</creatorcontrib><creatorcontrib>Moore, T. E.</creatorcontrib><creatorcontrib>Ergun, R. E.</creatorcontrib><creatorcontrib>Khotyaintsev, Y. V.</creatorcontrib><creatorcontrib>Lindqvist, P.-A.</creatorcontrib><creatorcontrib>Strangeway, R. J.</creatorcontrib><creatorcontrib>Magnes, W.</creatorcontrib><creatorcontrib>Bromund, K.</creatorcontrib><creatorcontrib>Leinweber, H.</creatorcontrib><creatorcontrib>Plaschke, F.</creatorcontrib><creatorcontrib>Anderson, B. J.</creatorcontrib><creatorcontrib>Burch, J. L.</creatorcontrib><title>Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma</title><title>Astrophysical journal. Letters</title><addtitle>APJL</addtitle><addtitle>Astrophys. J. Lett</addtitle><description>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 i (∼30 e) in the quasi-circular cross-section perpendicular to its axis, where i and 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 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.</description><subject>Astrophysics</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>Coherence</subject><subject>CROSS SECTIONS</subject><subject>DENSITY</subject><subject>Earth</subject><subject>ELECTRON TEMPERATURE</subject><subject>ELECTRONS</subject><subject>Fluid flow</subject><subject>Fluxes</subject><subject>HOLES</subject><subject>MAGNETIC FIELDS</subject><subject>MAGNETOSHEATH</subject><subject>Magnetospheres</subject><subject>Physics</subject><subject>PLANETS</subject><subject>planets and satellites: magnetic fields</subject><subject>planets and satellites: terrestrial planets</subject><subject>PLASMA</subject><subject>Plasma Physics</subject><subject>plasmas</subject><subject>PROTONS</subject><subject>SATELLITES</subject><subject>SIMULATION</subject><subject>SPACE</subject><subject>TRAPPING</subject><subject>TURBULENCE</subject><subject>Turbulent flow</subject><subject>VARIATIONS</subject><subject>VELOCITY</subject><subject>Vortices</subject><issn>2041-8205</issn><issn>2041-8213</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqN0lGL1DAQAOAiCp6n7z4GBFGw3jTZNOnjcp6usMf5cN7rkGbTa9ZsU5P01H9vSnVFEPUpyfDNEGamKJ5W8JrJlTijsKpKSSt2phTvONwrTo6h-8c78IfFoxj3ABTqSp4Uh0t1O5jk49ibYDW5nFyyUStnyFUbTbhTyfohEt-RC2d0Cn4gNz4k85UsmTln47O2A0m9IddTaCdnhkR-Fu6NSj354FQ8qMfFg065aJ78OE-Lj28vrs835fbq3fvz9bbUNaWp7Kg0DMSuboRqTMdoA6pRplVc6prVnTRU5ifArmWrttKMcS7ErmlbxvNTs9Pi1VI3fjHj1OIY7EGFb-iVxTf2Zo0-3OI0Ictt4SLz8t_8U-qRggRg2T9bvI_JYtQ2Gd1rPwy5QUhpzVecVVm9XFSv3G8lN-stzjGoZMMFhbvZvljsGPznycSEhzwF45wajJ8iZskaoA2j_0GFkHQFFWQKC9XBxxhMd_xGBThvDc5rgfOK4LI1vzpn_Yh7P4Uhz-lv_PkfuBr3DiWrkeKWChx3HfsOk9jQUQ</recordid><startdate>20170220</startdate><enddate>20170220</enddate><creator>Huang, S. 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Y. ; Sahraoui, F. ; Yuan, Z. G. ; He, J. S. ; Zhao, J. S. ; Contel, O. Le ; 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. ; Russell, C. T. ; Goodrich, K. A. ; Gershman, D. J. ; Moore, T. E. ; Ergun, R. E. ; Khotyaintsev, Y. V. ; Lindqvist, P.-A. ; Strangeway, R. J. ; Magnes, W. ; Bromund, K. ; Leinweber, H. ; Plaschke, F. ; Anderson, B. J. ; Burch, J. 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S.</au><au>Shi, Q. Q.</au><au>Lavraud, B.</au><au>Pang, Y.</au><au>Yang, J.</au><au>Wang, D. D.</au><au>Li, H. M.</au><au>Yu, X. D.</au><au>Pollock, C. J.</au><au>Giles, B. L.</au><au>Torbert, R. B.</au><au>Russell, C. T.</au><au>Goodrich, K. A.</au><au>Gershman, D. J.</au><au>Moore, T. E.</au><au>Ergun, R. E.</au><au>Khotyaintsev, Y. V.</au><au>Lindqvist, P.-A.</au><au>Strangeway, R. J.</au><au>Magnes, W.</au><au>Bromund, K.</au><au>Leinweber, H.</au><au>Plaschke, F.</au><au>Anderson, B. J.</au><au>Burch, J. L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma</atitle><jtitle>Astrophysical journal. Letters</jtitle><stitle>APJL</stitle><addtitle>Astrophys. J. Lett</addtitle><date>2017-02-20</date><risdate>2017</risdate><volume>836</volume><issue>2</issue><spage>L27</spage><epage>L27</epage><pages>L27-L27</pages><issn>2041-8205</issn><issn>2041-8213</issn><eissn>2041-8213</eissn><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 i (∼30 e) in the quasi-circular cross-section perpendicular to its axis, where i and 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 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.</abstract><cop>United States</cop><pub>The American Astronomical Society</pub><doi>10.3847/2041-8213/aa5f50</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0001-5550-3113</orcidid><orcidid>https://orcid.org/0000-0002-3859-6394</orcidid><orcidid>https://orcid.org/0000-0001-8179-417X</orcidid><orcidid>https://orcid.org/0000-0003-2713-7966</orcidid><orcidid>https://orcid.org/0000-0001-5617-9765</orcidid><orcidid>https://orcid.org/0000-0003-0586-2200</orcidid><orcidid>https://orcid.org/0000-0002-5973-8339</orcidid><orcidid>https://orcid.org/0000-0002-9964-8469</orcidid><orcidid>https://orcid.org/0000-0003-0086-6288</orcidid><orcidid>https://orcid.org/0000-0001-6807-8494</orcidid><orcidid>https://orcid.org/0000-0002-5104-6282</orcidid><oa>free_for_read</oa></addata></record>
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identifier ISSN: 2041-8205
ispartof Astrophysical journal. Letters, 2017-02, Vol.836 (2), p.L27-L27
issn 2041-8205
2041-8213
2041-8213
language eng
recordid cdi_hal_primary_oai_HAL_hal_01895720v1
source Institute of Physics Open Access Journal Titles
subjects Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Coherence
CROSS SECTIONS
DENSITY
Earth
ELECTRON TEMPERATURE
ELECTRONS
Fluid flow
Fluxes
HOLES
MAGNETIC FIELDS
MAGNETOSHEATH
Magnetospheres
Physics
PLANETS
planets and satellites: magnetic fields
planets and satellites: terrestrial planets
PLASMA
Plasma Physics
plasmas
PROTONS
SATELLITES
SIMULATION
SPACE
TRAPPING
TURBULENCE
Turbulent flow
VARIATIONS
VELOCITY
Vortices
title Magnetospheric Multiscale Observations of Electron Vortex Magnetic Hole in the Turbulent Magnetosheath Plasma
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