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Secondary reconnection sites in reconnection-generated flux ropes and reconnection fronts
KTH, Skolan för datavetenskap och kommunikation (CSC), High Performance Computing and Visualization (HPCViz).ORCID-id: 0000-0003-0639-0639
2015 (Engelska)Ingår i: Nature Physics, ISSN 1745-2473, E-ISSN 1745-2481, Vol. 11, nr 8, s. 690-+Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The primary target of the Magnetospheric MultiScale (MMS) mission is the electron-scale diffusion layer around reconnection sites. Here we study where these regions are found in full three-dimensional simulations. In two dimensions the sites of electron diffusion, defined as the regions where magnetic topology changes and electrons move with respect to the magnetic field lines, are located near the reconnection site. But in three dimensions we find that the reconnection exhaust far from the primary reconnection site also becomes host to secondary reconnection sites. Four diagnostics are used to demonstrate the point: the direct observation of topology impossible without secondary reconnection, the direct measurement of topological field line breakage, the measurement of electron jets emerging from secondary reconnection regions, and the violation of the frozen-in condition. We conclude that secondary reconnection occurs in a large part of the exhaust, providing many more chances for MMS to find itself in the right region to hit its target.

Ort, förlag, år, upplaga, sidor
2015. Vol. 11, nr 8, s. 690-+
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URN: urn:nbn:se:kth:diva-173157DOI: 10.1038/NPHYS3406ISI: 000358851900025Scopus ID: 2-s2.0-84938557110OAI: oai:DiVA.org:kth-173157DiVA, id: diva2:854723
Forskningsfinansiär
Vetenskapsrådet, D621-2013-4309
Anmärkning

QC 20150917

Tillgänglig från: 2015-09-17 Skapad: 2015-09-07 Senast uppdaterad: 2017-12-04Bibliografiskt granskad

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