Cold ion demagnetization near the X-line of magnetic reconnection

Sergio Toledo-Redondo; Mats André; Yuri V. Khotyaintsev; Andris Vaivads; Andrew Walsh; Wenya Li; Daniel B. Graham; Benoit Lavraud; Arnaud Masson; Nicolas Aunai; Andrey Divin; Jeremy Dargent; Stephen Fuselier; Daniel J. Gershman; John Dorelli; Barbara Giles; Levon Avanov; Craig Pollock; Yoshifumi Saito; Thomas E. Moore; Victoria Coffey; Michael O. Chandler; Per Arne Lindqvist; Roy Torbert; Christopher T. Russell

doi:10.1002/2016GL069877

Cold ion demagnetization near the X-line of magnetic reconnection

Sergio Toledo-Redondo
, Mats André
, Yuri V. Khotyaintsev
, Andris Vaivads
, Andrew Walsh
, Wenya Li
, Daniel B. Graham
, Benoit Lavraud
, Arnaud Masson
, Nicolas Aunai
, Andrey Divin
, Jeremy Dargent
, Stephen Fuselier
, Daniel J. Gershman
, John Dorelli
, Barbara Giles
, Levon Avanov
, Craig Pollock
, Yoshifumi Saito
, Thomas E. Moore

Victoria Coffey, Michael O. Chandler, Per Arne Lindqvist, Roy Torbert, Christopher T. Russell

ESAC campus
Swedish Institute of Space Physics
IRAP/CNRS
CNRS
LPP
Saint Petersburg State University
Southwest Research Institute
University of Texas
NASA Goddard Space Flight Center
University of Maryland
ISAS/JAXA
NASA Marshall Space Flight Center
KTH Royal Institute of Technology
University of New Hampshire Durham
Institute of Geophysics and Planetary Physics, University of California

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

Résumé

Although the effects of magnetic reconnection in magnetospheres can be observed at planetary scales, reconnection is initiated at electron scales in a plasma. Surrounding the electron diffusion region, there is an Ion-Decoupling Region (IDR) of the size of the ion length scales (inertial length and gyroradius). Reconnection at the Earth's magnetopause often includes cold magnetospheric (few tens of eV), hot magnetospheric (10 keV), and magnetosheath (1 keV) ions, with different gyroradius length scales. We report observations of a subregion inside the IDR of the size of the cold ion population gyroradius (∼15 km) where the cold ions are demagnetized and accelerated parallel to the Hall electric field. Outside the subregion, cold ions follow the E × B motion together with electrons, while hot ions are demagnetized. We observe a sharp cold ion density gradient separating the two regions, which we identify as the cold and hot IDRs.

langue originale	Anglais
Pages (de - à)	6759-6767
Nombre de pages	9
journal	Geophysical Research Letters
Volume	43
Numéro de publication	13
Les DOIs	https://doi.org/10.1002/2016GL069877
état	Publié - 16 juil. 2016
Modification externe	Oui

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10.1002/2016GL069877

Contient cette citation

Toledo-Redondo, S., André, M., Khotyaintsev, Y. V., Vaivads, A., Walsh, A., Li, W., Graham, D. B., Lavraud, B., Masson, A., Aunai, N., Divin, A., Dargent, J., Fuselier, S., Gershman, D. J., Dorelli, J., Giles, B., Avanov, L., Pollock, C., Saito, Y., ... Russell, C. T. (2016). Cold ion demagnetization near the X-line of magnetic reconnection. Geophysical Research Letters, 43(13), 6759-6767. https://doi.org/10.1002/2016GL069877

@article{dd62b838c1db4a018075c05ccc3f9f18,

title = "Cold ion demagnetization near the X-line of magnetic reconnection",

abstract = "Although the effects of magnetic reconnection in magnetospheres can be observed at planetary scales, reconnection is initiated at electron scales in a plasma. Surrounding the electron diffusion region, there is an Ion-Decoupling Region (IDR) of the size of the ion length scales (inertial length and gyroradius). Reconnection at the Earth's magnetopause often includes cold magnetospheric (few tens of eV), hot magnetospheric (10 keV), and magnetosheath (1 keV) ions, with different gyroradius length scales. We report observations of a subregion inside the IDR of the size of the cold ion population gyroradius (∼15 km) where the cold ions are demagnetized and accelerated parallel to the Hall electric field. Outside the subregion, cold ions follow the E × B motion together with electrons, while hot ions are demagnetized. We observe a sharp cold ion density gradient separating the two regions, which we identify as the cold and hot IDRs.",

keywords = "magnetic reconnection",

author = "Sergio Toledo-Redondo and Mats Andr{\'e} and Khotyaintsev, \{Yuri V.\} and Andris Vaivads and Andrew Walsh and Wenya Li and Graham, \{Daniel B.\} and Benoit Lavraud and Arnaud Masson and Nicolas Aunai and Andrey Divin and Jeremy Dargent and Stephen Fuselier and Gershman, \{Daniel J.\} and John Dorelli and Barbara Giles and Levon Avanov and Craig Pollock and Yoshifumi Saito and Moore, \{Thomas E.\} and Victoria Coffey and Chandler, \{Michael O.\} and Lindqvist, \{Per Arne\} and Roy Torbert and Russell, \{Christopher T.\}",

year = "2016",

month = jul,

day = "16",

doi = "10.1002/2016GL069877",

language = "English",

volume = "43",

pages = "6759--6767",

journal = "Geophysical Research Letters",

issn = "0094-8276",

number = "13",

}

Toledo-Redondo, S, André, M, Khotyaintsev, YV, Vaivads, A, Walsh, A, Li, W, Graham, DB, Lavraud, B, Masson, A, Aunai, N, Divin, A, Dargent, J, Fuselier, S, Gershman, DJ, Dorelli, J, Giles, B, Avanov, L, Pollock, C, Saito, Y, Moore, TE, Coffey, V, Chandler, MO, Lindqvist, PA, Torbert, R & Russell, CT 2016, 'Cold ion demagnetization near the X-line of magnetic reconnection', Geophysical Research Letters, VOL. 43, Numéro 13, p. 6759-6767. https://doi.org/10.1002/2016GL069877

TY - JOUR

T1 - Cold ion demagnetization near the X-line of magnetic reconnection

AU - Toledo-Redondo, Sergio

AU - André, Mats

AU - Khotyaintsev, Yuri V.

AU - Vaivads, Andris

AU - Walsh, Andrew

AU - Li, Wenya

AU - Graham, Daniel B.

AU - Lavraud, Benoit

AU - Masson, Arnaud

AU - Aunai, Nicolas

AU - Divin, Andrey

AU - Dargent, Jeremy

AU - Fuselier, Stephen

AU - Gershman, Daniel J.

AU - Dorelli, John

AU - Giles, Barbara

AU - Avanov, Levon

AU - Pollock, Craig

AU - Saito, Yoshifumi

AU - Moore, Thomas E.

AU - Coffey, Victoria

AU - Chandler, Michael O.

AU - Lindqvist, Per Arne

AU - Torbert, Roy

AU - Russell, Christopher T.

PY - 2016/7/16

Y1 - 2016/7/16

N2 - Although the effects of magnetic reconnection in magnetospheres can be observed at planetary scales, reconnection is initiated at electron scales in a plasma. Surrounding the electron diffusion region, there is an Ion-Decoupling Region (IDR) of the size of the ion length scales (inertial length and gyroradius). Reconnection at the Earth's magnetopause often includes cold magnetospheric (few tens of eV), hot magnetospheric (10 keV), and magnetosheath (1 keV) ions, with different gyroradius length scales. We report observations of a subregion inside the IDR of the size of the cold ion population gyroradius (∼15 km) where the cold ions are demagnetized and accelerated parallel to the Hall electric field. Outside the subregion, cold ions follow the E × B motion together with electrons, while hot ions are demagnetized. We observe a sharp cold ion density gradient separating the two regions, which we identify as the cold and hot IDRs.

AB - Although the effects of magnetic reconnection in magnetospheres can be observed at planetary scales, reconnection is initiated at electron scales in a plasma. Surrounding the electron diffusion region, there is an Ion-Decoupling Region (IDR) of the size of the ion length scales (inertial length and gyroradius). Reconnection at the Earth's magnetopause often includes cold magnetospheric (few tens of eV), hot magnetospheric (10 keV), and magnetosheath (1 keV) ions, with different gyroradius length scales. We report observations of a subregion inside the IDR of the size of the cold ion population gyroradius (∼15 km) where the cold ions are demagnetized and accelerated parallel to the Hall electric field. Outside the subregion, cold ions follow the E × B motion together with electrons, while hot ions are demagnetized. We observe a sharp cold ion density gradient separating the two regions, which we identify as the cold and hot IDRs.

KW - magnetic reconnection

U2 - 10.1002/2016GL069877

DO - 10.1002/2016GL069877

M3 - Article

AN - SCOPUS:84978880834

SN - 0094-8276

VL - 43

SP - 6759

EP - 6767

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 13

ER -

Cold ion demagnetization near the X-line of magnetic reconnection

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