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Reconnection With Magnetic Flux Pileup at the Interface of Converging ts at the Magnetopause
Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. rake, J. F..
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2019 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 46, no 4, p. 1937-1946Article in journal (Refereed) Published
Abstract [en]

We report Magnetospheric Multiscale observations of reconnection in a in current sheet at the interface of interlinked flux tubes carried by nverging reconnection jets at Earth's magnetopause. The ion skin pth-scale width of the interface current sheet and the non-frozen-in ns indicate that Magnetospheric Multiscale crossed the reconnection yer near the X-line, through the ion diffusion region. Significant leup of the reconnecting component of the magnetic field in this and ree other events on approach to the interface current sheet was companied by an increase in magnetic shear and decrease in , leading conditions favorable for reconnection at the interface current sheet. e pileup also led to enhanced available magnetic energy per particle d strong electron heating. The observations shed light on the olution and energy release in 3-D systems with multiple reconnection tes. ain Language Summary The Earth and the solar wind magnetic fields terconnect through a process called magnetic reconnection. The newly connected magnetic field lines are strongly bent and accelerate rticles, similar to a rubber band in a slingshot. In this paper we ve used observations from NASA's Magnetospheric MultiScale spacecraft investigate what happens when two of these slingshot-like magnetic eld lines move toward each other and get tangled up. We found that the o bent magnetic field lines tend to orient themselves perpendicular to ch other as they become interlinked and stretched, similar to what bber bands would do. This reorientation allows the interlinked gnetic fields to reconnect again, releasing part of the built-up gnetic energy as strong electron heating. The results are important cause they show how interlinked magnetic fields, which occur in many lar and astrophysics contexts, reconnect and produce enhanced electron ating, something that was not understood before.

Place, publisher, year, edition, pages
American Geophysical Union (AGU), 2019. Vol. 46, no 4, p. 1937-1946
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Physical Sciences
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URN: urn:nbn:se:kth:diva-248358DOI: 10.1029/2018GL080994ISI: 000461855600006Scopus ID: 2-s2.0-85062358083OAI: oai:DiVA.org:kth-248358DiVA, id: diva2:1302629
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QC 20190405

Available from: 2019-04-05 Created: 2019-04-05 Last updated: 2019-05-23Bibliographically approved

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Lindqvist, Per-Arne

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