Magnetic Reconnection Inside a Flux Rope Induced by Kelvin-Helmholtz Vortices

被引：37

作者：

Hwang, K-J ^{[1
]}

Dokgo, K. ^{[1
]}

Choi, E. ^{[1
]}

Burch, J. L. ^{[1
]}

Sibeck, D. G. ^{[2
]}

Giles, B. L. ^{[2
]}

Hasegawa, H. ^{[3
]}

Fu, H. S. ^{[4
]}

Liu, Y. ^{[4
]}

Wang, Z. ^{[4
]}

Nakamura, T. K. M. ^{[5
]}

Ma, X. ^{[6
]}

Fear, R. C. ^{[7
]}

Khotyaintsev, Y. ^{[8
]}

Graham, D. B. ^{[8
]}

Shi, Q. Q. ^{[9
]}

Escoubet, C. P. ^{[10
]}

Gershman, D. J. ^{[2
]}

Paterson, W. R. ^{[2
]}

Pollock, C. J. ^{[11
]}

Ergun, R. E. ^{[12
]}

Torbert, R. B. ^{[13
]}

Dorelli, J. C. ^{[2
]}

Avanov, L. ^{[2
,14
]}

Russell, C. T. ^{[15
]}

Strangeway, R. J. ^{[15
]}

机构：

[1] Southwest Res Inst, San Antonio, TX 78238 USA

[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

[3] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan

[4] Beihang Univ, Sch Sci & Environm, Beijing, Peoples R China

[5] Austrian Acad Sci OAW, Space Res Inst, Graz, Austria

[6] Embry Riddle Aeronaut Univ, Phys Sci Dept, Daytona Beach, FL USA

[7] Univ Southampton, Sch Phys & Astron, Southampton, Hants, England

[8] Swedish Inst Space Phys, Uppsala, Sweden

[9] Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China

[10] European Space Technol Ctr, Noordwijk, Netherlands

[11] Denali Sci LLC, Fairbanks, AK USA

[12] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA

[13] Univ New Hampshire, Space Sci Ctr, Durham, NH 03824 USA

[14] Univ Maryland, Goddard Planetary Heliophys Inst, Baltimore, MD 21201 USA

[15] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2020年 / 125卷 / 04期

关键词：

ELECTRON-DIFFUSION REGION; TRANSFER EVENTS; MAGNETOTAIL RECONNECTION; PLASMA TRANSPORT; MMS OBSERVATIONS; BOUNDARY; WAVES; INSTABILITY; SIGNATURES; EXHAUST;

D O I：

10.1029/2019JA027665

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：16

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