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Electron scale structures and magnetic reconnection signatures in the turbulent magnetosheath

Yordanova, E; Vörös, Z; Varsani, A; Graham, DB; Norgren, C; Khotyaintsev, YV; Vaivads, A; ... Saito, Y; + view all (2016) Electron scale structures and magnetic reconnection signatures in the turbulent magnetosheath. Geophysical Research Letters , 43 (12) pp. 5969-5978. 10.1002/2016GL069191. Green open access

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Abstract

Collisionless space plasma turbulence can generate reconnecting thin current sheets as suggested by recent results of numerical magnetohydrodynamic simulations. The Magnetospheric Multiscale (MMS) mission provides the first serious opportunity to verify whether small ion-electron-scale reconnection, generated by turbulence, resembles the reconnection events frequently observed in the magnetotail or at the magnetopause. Here we investigate field and particle observations obtained by the MMS fleet in the turbulent terrestrial magnetosheath behind quasi-parallel bow shock geometry. We observe multiple small-scale current sheets during the event and present a detailed look of one of the detected structures. The emergence of thin current sheets can lead to electron scale structures. Within these structures, we see signatures of ion demagnetization, electron jets, electron heating, and agyrotropy suggesting that MMS spacecraft observe reconnection at these scales.

Type: Article
Title: Electron scale structures and magnetic reconnection signatures in the turbulent magnetosheath
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/2016GL069191
Publisher version: http://dx.doi.org/10.1002/2016GL069191
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1570495
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