Electron jet of asymmetric reconnection

Yu V. Khotyaintsev; D. B. Graham; C. Norgren; E. Eriksson; W. Li; A. Johlander; A. Vaivads; M. André; P. L. Pritchett; A. Retinò; T. D. Phan; R. E. Ergun; K. Goodrich; P. A. Lindqvist; G. T. Marklund; O. Le Contel; F. Plaschke; W. Magnes; R. J. Strangeway; C. T. Russell; H. Vaith; M. R. Argall; C. A. Kletzing; R. Nakamura; R. B. Torbert; W. R. Paterson; D. J. Gershman; J. C. Dorelli; L. A. Avanov; B. Lavraud; Y. Saito; B. L. Giles; C. J. Pollock; D. L. Turner; J. D. Blake; J. F. Fennell; A. Jaynes; B. H. Mauk; J. L. Burch

doi:10.1002/2016GL069064

Electron jet of asymmetric reconnection

Yu V. Khotyaintsev
, D. B. Graham
, C. Norgren
, E. Eriksson
, W. Li
, A. Johlander
, A. Vaivads
, M. André
, P. L. Pritchett
, A. Retinò
, T. D. Phan
, R. E. Ergun
, K. Goodrich
, P. A. Lindqvist
, G. T. Marklund
, O. Le Contel
, F. Plaschke
, W. Magnes
, R. J. Strangeway
, C. T. Russell

H. Vaith, M. R. Argall, C. A. Kletzing, R. Nakamura, R. B. Torbert, W. R. Paterson, D. J. Gershman, J. C. Dorelli, L. A. Avanov, B. Lavraud, Y. Saito, B. L. Giles, C. J. Pollock, D. L. Turner, J. D. Blake, J. F. Fennell, A. Jaynes, B. H. Mauk, J. L. Burch

Swedish Institute of Space Physics
Uppsala University
University of California, Los Angeles
LPP
University of California, Space Sciences Laboratory
University of Colorado Boulder
KTH Royal Institute of Technology
Space Research Institute
Institute of Geophysics and Planetary Physics, University of California
University of New Hampshire Durham
University of Iowa
NASA Goddard Space Flight Center
University of Maryland
IRAP/CNRS
Japan Aerospace Exploration Agency
The Aerospace Corporation
Johns Hopkins University Applied Physics Laboratory
Southwest Research Institute

Résultats de recherche: Contribution à un journal › Lettre › Revue par des pairs

Résumé

We present Magnetospheric Multiscale observations of an electron-scale current sheet and electron outflow jet for asymmetric reconnection with guide field at the subsolar magnetopause. The electron jet observed within the reconnection region has an electron Mach number of 0.35 and is associated with electron agyrotropy. The jet is unstable to an electrostatic instability which generates intense waves with E_∥ amplitudes reaching up to 300 mV m⁻¹ and potentials up to 20% of the electron thermal energy. We see evidence of interaction between the waves and the electron beam, leading to quick thermalization of the beam and stabilization of the instability. The wave phase speed is comparable to the ion thermal speed, suggesting that the instability is of Buneman type, and therefore introduces electron-ion drag and leads to braking of the electron flow. Our observations demonstrate that electrostatic turbulence plays an important role in the electron-scale physics of asymmetric reconnection.

langue originale	Anglais
Pages (de - à)	5571-5580
Nombre de pages	10
journal	Geophysical Research Letters
Volume	43
Numéro de publication	11
Les DOIs	https://doi.org/10.1002/2016GL069064
état	Publié - 16 juin 2016
Modification externe	Oui

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10.1002/2016GL069064

Contient cette citation

Khotyaintsev, Y. V., Graham, D. B., Norgren, C., Eriksson, E., Li, W., Johlander, A., Vaivads, A., André, M., Pritchett, P. L., Retinò, A., Phan, T. D., Ergun, R. E., Goodrich, K., Lindqvist, P. A., Marklund, G. T., Le Contel, O., Plaschke, F., Magnes, W., Strangeway, R. J., ... Burch, J. L. (2016). Electron jet of asymmetric reconnection. Geophysical Research Letters, 43(11), 5571-5580. https://doi.org/10.1002/2016GL069064

@article{e57fe142fe6545e7bf137f45ca69bbf3,

title = "Electron jet of asymmetric reconnection",

abstract = "We present Magnetospheric Multiscale observations of an electron-scale current sheet and electron outflow jet for asymmetric reconnection with guide field at the subsolar magnetopause. The electron jet observed within the reconnection region has an electron Mach number of 0.35 and is associated with electron agyrotropy. The jet is unstable to an electrostatic instability which generates intense waves with E∥ amplitudes reaching up to 300 mV m−1 and potentials up to 20\% of the electron thermal energy. We see evidence of interaction between the waves and the electron beam, leading to quick thermalization of the beam and stabilization of the instability. The wave phase speed is comparable to the ion thermal speed, suggesting that the instability is of Buneman type, and therefore introduces electron-ion drag and leads to braking of the electron flow. Our observations demonstrate that electrostatic turbulence plays an important role in the electron-scale physics of asymmetric reconnection.",

keywords = "Buneman instability, diffusion region, electron dynamics, lower hybrid waves, magnetic reconnection",

author = "Khotyaintsev, \{Yu V.\} and Graham, \{D. B.\} and C. Norgren and E. Eriksson and W. Li and A. Johlander and A. Vaivads and M. Andr{\'e} and Pritchett, \{P. L.\} and A. Retin{\`o} and Phan, \{T. D.\} and Ergun, \{R. E.\} and K. Goodrich and Lindqvist, \{P. A.\} and Marklund, \{G. T.\} and \{Le Contel\}, O. and F. Plaschke and W. Magnes and Strangeway, \{R. J.\} and Russell, \{C. T.\} and H. Vaith and Argall, \{M. R.\} and Kletzing, \{C. A.\} and R. Nakamura and Torbert, \{R. B.\} and Paterson, \{W. R.\} and Gershman, \{D. J.\} and Dorelli, \{J. C.\} and Avanov, \{L. A.\} and B. Lavraud and Y. Saito and Giles, \{B. L.\} and Pollock, \{C. J.\} and Turner, \{D. L.\} and Blake, \{J. D.\} and Fennell, \{J. F.\} and A. Jaynes and Mauk, \{B. H.\} and Burch, \{J. L.\}",

year = "2016",

month = jun,

day = "16",

doi = "10.1002/2016GL069064",

language = "English",

volume = "43",

pages = "5571--5580",

journal = "Geophysical Research Letters",

issn = "0094-8276",

number = "11",

}

Khotyaintsev, YV, Graham, DB, Norgren, C, Eriksson, E, Li, W, Johlander, A, Vaivads, A, André, M, Pritchett, PL, Retinò, A, Phan, TD, Ergun, RE, Goodrich, K, Lindqvist, PA, Marklund, GT, Le Contel, O, Plaschke, F, Magnes, W, Strangeway, RJ, Russell, CT, Vaith, H, Argall, MR, Kletzing, CA, Nakamura, R, Torbert, RB, Paterson, WR, Gershman, DJ, Dorelli, JC, Avanov, LA, Lavraud, B, Saito, Y, Giles, BL, Pollock, CJ, Turner, DL, Blake, JD, Fennell, JF, Jaynes, A, Mauk, BH & Burch, JL 2016, 'Electron jet of asymmetric reconnection', Geophysical Research Letters, VOL. 43, Numéro 11, p. 5571-5580. https://doi.org/10.1002/2016GL069064

TY - JOUR

T1 - Electron jet of asymmetric reconnection

AU - Khotyaintsev, Yu V.

AU - Graham, D. B.

AU - Norgren, C.

AU - Eriksson, E.

AU - Li, W.

AU - Johlander, A.

AU - Vaivads, A.

AU - André, M.

AU - Pritchett, P. L.

AU - Retinò, A.

AU - Phan, T. D.

AU - Ergun, R. E.

AU - Goodrich, K.

AU - Lindqvist, P. A.

AU - Marklund, G. T.

AU - Le Contel, O.

AU - Plaschke, F.

AU - Magnes, W.

AU - Strangeway, R. J.

AU - Russell, C. T.

AU - Vaith, H.

AU - Argall, M. R.

AU - Kletzing, C. A.

AU - Nakamura, R.

AU - Torbert, R. B.

AU - Paterson, W. R.

AU - Gershman, D. J.

AU - Dorelli, J. C.

AU - Avanov, L. A.

AU - Lavraud, B.

AU - Saito, Y.

AU - Giles, B. L.

AU - Pollock, C. J.

AU - Turner, D. L.

AU - Blake, J. D.

AU - Fennell, J. F.

AU - Jaynes, A.

AU - Mauk, B. H.

AU - Burch, J. L.

PY - 2016/6/16

Y1 - 2016/6/16

N2 - We present Magnetospheric Multiscale observations of an electron-scale current sheet and electron outflow jet for asymmetric reconnection with guide field at the subsolar magnetopause. The electron jet observed within the reconnection region has an electron Mach number of 0.35 and is associated with electron agyrotropy. The jet is unstable to an electrostatic instability which generates intense waves with E∥ amplitudes reaching up to 300 mV m−1 and potentials up to 20% of the electron thermal energy. We see evidence of interaction between the waves and the electron beam, leading to quick thermalization of the beam and stabilization of the instability. The wave phase speed is comparable to the ion thermal speed, suggesting that the instability is of Buneman type, and therefore introduces electron-ion drag and leads to braking of the electron flow. Our observations demonstrate that electrostatic turbulence plays an important role in the electron-scale physics of asymmetric reconnection.

AB - We present Magnetospheric Multiscale observations of an electron-scale current sheet and electron outflow jet for asymmetric reconnection with guide field at the subsolar magnetopause. The electron jet observed within the reconnection region has an electron Mach number of 0.35 and is associated with electron agyrotropy. The jet is unstable to an electrostatic instability which generates intense waves with E∥ amplitudes reaching up to 300 mV m−1 and potentials up to 20% of the electron thermal energy. We see evidence of interaction between the waves and the electron beam, leading to quick thermalization of the beam and stabilization of the instability. The wave phase speed is comparable to the ion thermal speed, suggesting that the instability is of Buneman type, and therefore introduces electron-ion drag and leads to braking of the electron flow. Our observations demonstrate that electrostatic turbulence plays an important role in the electron-scale physics of asymmetric reconnection.

KW - Buneman instability

KW - diffusion region

KW - electron dynamics

KW - lower hybrid waves

KW - magnetic reconnection

U2 - 10.1002/2016GL069064

DO - 10.1002/2016GL069064

M3 - Letter

AN - SCOPUS:84973444959

SN - 0094-8276

VL - 43

SP - 5571

EP - 5580

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 11

ER -

Electron jet of asymmetric reconnection

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