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Ion-scale secondary flux ropes generated by magnetopause reconnection as resolved by MMS
Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London, England..
Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA..
W Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA..
NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.;Univ Maryland, Dept Astron, College Pk, MD 20742 USA..
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2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 10, 4716-4724 p.Article in journal (Refereed) Published
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Abstract [en]

New Magnetospheric Multiscale (MMS) observations of small-scale (similar to 7 ion inertial length radius) flux transfer events (FTEs) at the dayside magnetopause are reported. The 10 km MMS tetrahedron size enables their structure and properties to be calculated using a variety of multispacecraft techniques, allowing them to be identified as flux ropes, whose flux content is small (similar to 22 kWb). The current density, calculated using plasma and magnetic field measurements independently, is found to be filamentary. Intercomparison of the plasma moments with electric and magnetic field measurements reveals structured non-frozen-in ion behavior. The data are further compared with a particle-in-cell simulation. It is concluded that these small-scale flux ropes, which are not seen to be growing, represent a distinct class of FTE which is generated on the magnetopause by secondary reconnection.

Place, publisher, year, edition, pages
2016. Vol. 43, no 10, 4716-4724 p.
National Category
Astronomy, Astrophysics and Cosmology
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URN: urn:nbn:se:uu:diva-299742DOI: 10.1002/2016GL068747ISI: 000378347500007OAI: oai:DiVA.org:uu-299742DiVA: diva2:949954
Available from: 2016-07-26 Created: 2016-07-26 Last updated: 2017-11-28Bibliographically approved

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Khotyaintsev, Yuri
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Swedish Institute of Space Physics, Uppsala Division
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