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Magnetic reconnection inside a flux rope induced by Kelvin-Helmholtz Vortices

Magnetic reconnection inside a flux rope induced by Kelvin-Helmholtz Vortices
Magnetic reconnection inside a flux rope induced by Kelvin-Helmholtz Vortices

On 5 May 2017, MMS observed a crater-type flux rope on the dawnside tailward magnetopause with fluctuations. The boundary-normal analysis shows that the fluctuations can be attributed to nonlinear Kelvin-Helmholtz (KH) waves. Reconnection signatures such as flow reversals and Joule dissipation were identified at the leading and trailing edges of the flux rope. In particular, strong northward electron jets observed at the trailing edge indicated midlatitude reconnection associated with the 3-D structure of the KH vortex. The scale size of the flux rope, together with reconnection signatures, strongly supports the interpretation that the flux rope was generated locally by KH vortex-induced reconnection. The center of the flux rope also displayed signatures of guide-field reconnection (out-of-plane electron jets, parallel electron heating, and Joule dissipation). These signatures indicate that an interface between two interlinked flux tubes was undergoing interaction, causing a local magnetic depression, resulting in an M-shaped crater flux rope, as supported by reconstruction.

Flux rope, Interlinked flux tubes, Kelvin-Helmholtz vortex, Kelvin-Helmholtz wave, Magnetopause, Reconnection
2169-9380
Hwang, K.-J.
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Dokgo, K.
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Choi, E.
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Burch, J.L.
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Sibeck, D.G.
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Giles, B.L.
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Hasegawa, H.
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Fu, H.S.
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Liu, Y.
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Wang, Z.
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Nakamura, T.K.M.
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Ma, X.
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Fear, R.C.
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Khotyaintsev, Y.
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Graham, D.B.
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Shi, Q.Q.
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Escoubet, C.P.
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Gershman, D.J.
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Paterson, W.R.
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Pollock, C.J.
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Ergun, R.E.
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Torbert, R.B.
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Dorelli, J.C.
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Avanov, L.
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Russell, C.T.
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Strangeway, R.J.
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Hwang, K.-J.
c1ba4bc9-72c0-4af5-9d4a-871deafaf342
Dokgo, K.
5db94ee4-2f18-46b9-9162-553ece81f363
Choi, E.
68a4e40b-1095-4cf3-9618-ccd82f1acef6
Burch, J.L.
b41e84fd-e56a-4b32-80cb-5f0326e66516
Sibeck, D.G.
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Giles, B.L.
eceb7be2-b272-40cb-a9af-82687b2708fd
Hasegawa, H.
8fab5fa7-ba27-46ac-9826-c65f20ff0825
Fu, H.S.
f35fc64a-cc52-4b02-8770-9061188f2017
Liu, Y.
3e6824a3-f4c3-4136-840f-8e3ccacf978f
Wang, Z.
9e29b25a-083f-4cfb-9a49-a93cb8eefcbf
Nakamura, T.K.M.
5d473ada-8ee3-46c4-9221-74cb9c7a6cf2
Ma, X.
cf2e32c6-2617-4972-af67-4d3291610f3e
Fear, R.C.
8755b9ed-c7dc-4cbb-ac9b-56235a0431ab
Khotyaintsev, Y.
93eb939d-f13c-4b3e-ac38-2fd9e796f4dd
Graham, D.B.
eb542bc6-8ab4-4b10-a6a7-49ba24b07dab
Shi, Q.Q.
5a74b072-751b-4a34-a45d-36bf268e6e8a
Escoubet, C.P.
4388461f-bb11-4f16-bb3b-17bd5b77f4d2
Gershman, D.J.
00afda5d-e397-4629-b978-12058b1f7c72
Paterson, W.R.
bd6a4e41-c1bd-44ab-9c2f-3672a1d895b1
Pollock, C.J.
eb29ec94-934c-4e9d-924f-440a03f20012
Ergun, R.E.
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Torbert, R.B.
dfb49866-d44d-4404-81cd-22cef59d8f03
Dorelli, J.C.
9a0848b2-5c60-43fc-9672-d106670b1f78
Avanov, L.
b0ed2e9b-5e37-4ba2-9258-6f691940e21f
Russell, C.T.
9938ee7b-0590-4c5e-ac62-8658500dac22
Strangeway, R.J.
2fd4cc7c-d923-448d-babf-ce95399ed494

Hwang, K.-J., Dokgo, K., Choi, E., Burch, J.L., Sibeck, D.G., Giles, B.L., Hasegawa, H., Fu, H.S., Liu, Y., Wang, Z., Nakamura, T.K.M., Ma, X., Fear, R.C., Khotyaintsev, Y., Graham, D.B., Shi, Q.Q., Escoubet, C.P., Gershman, D.J., Paterson, W.R., Pollock, C.J., Ergun, R.E., Torbert, R.B., Dorelli, J.C., Avanov, L., Russell, C.T. and Strangeway, R.J. (2020) Magnetic reconnection inside a flux rope induced by Kelvin-Helmholtz Vortices. Journal of Geophysical Research: Space Physics, 125 (4), [e2019JA027665]. (doi:10.1029/2019JA027665).

Record type: Article

Abstract

On 5 May 2017, MMS observed a crater-type flux rope on the dawnside tailward magnetopause with fluctuations. The boundary-normal analysis shows that the fluctuations can be attributed to nonlinear Kelvin-Helmholtz (KH) waves. Reconnection signatures such as flow reversals and Joule dissipation were identified at the leading and trailing edges of the flux rope. In particular, strong northward electron jets observed at the trailing edge indicated midlatitude reconnection associated with the 3-D structure of the KH vortex. The scale size of the flux rope, together with reconnection signatures, strongly supports the interpretation that the flux rope was generated locally by KH vortex-induced reconnection. The center of the flux rope also displayed signatures of guide-field reconnection (out-of-plane electron jets, parallel electron heating, and Joule dissipation). These signatures indicate that an interface between two interlinked flux tubes was undergoing interaction, causing a local magnetic depression, resulting in an M-shaped crater flux rope, as supported by reconstruction.

Text
JGR Space Physics - 2020 - Hwang - Magnetic Reconnection Inside a Flux Rope Induced by Kelvin‐Helmholtz Vortices - Version of Record
Available under License Creative Commons Attribution Non-commercial No Derivatives.
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More information

Accepted/In Press date: 3 March 2020
e-pub ahead of print date: 25 March 2020
Published date: 8 April 2020
Additional Information: Publisher Copyright: ©2020. The Authors.
Keywords: Flux rope, Interlinked flux tubes, Kelvin-Helmholtz vortex, Kelvin-Helmholtz wave, Magnetopause, Reconnection
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Identifiers

Local EPrints ID: 491562
URI: http://eprints.soton.ac.uk/id/eprint/491562
DOI: doi:10.1029/2019JA027665
ISSN: 2169-9380
PURE UUID: c5abb233-9f15-4ee9-8af8-d882bf8406aa
ORCID for R.C. Fear: ORCID iD orcid.org/0000-0003-0589-7147

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Date deposited: 26 Jun 2024 16:31
Last modified: 12 Jul 2024 01:51

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Contributors

Author: K.-J. Hwang
Author: K. Dokgo
Author: E. Choi
Author: J.L. Burch
Author: D.G. Sibeck
Author: B.L. Giles
Author: H. Hasegawa
Author: H.S. Fu
Author: Y. Liu
Author: Z. Wang
Author: T.K.M. Nakamura
Author: X. Ma
Author: R.C. Fear ORCID iD
Author: Y. Khotyaintsev
Author: D.B. Graham
Author: Q.Q. Shi
Author: C.P. Escoubet
Author: D.J. Gershman
Author: W.R. Paterson
Author: C.J. Pollock
Author: R.E. Ergun
Author: R.B. Torbert
Author: J.C. Dorelli
Author: L. Avanov
Author: C.T. Russell
Author: R.J. Strangeway

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