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Magnetic reconnection and modification of the Hall physics due to cold ions at the magnetopause
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2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 13, 6705-6712 p.Article in journal (Refereed) Published
Abstract [en]

Observations by the four Magnetospheric Multiscale spacecraft are used to investigate the Hall physics of a magnetopause magnetic reconnection separatrix layer. Inside this layer of currents and strong normal electric fields, cold (eV) ions of ionospheric origin can remain frozen-in together with the electrons. The cold ions reduce the Hall current. Using a generalized Ohm's law, the electric field is balanced by the sum of the terms corresponding to the Hall current, the vxB drifting cold ions, and the divergence of the electron pressure tensor. A mixture of hot and cold ions is common at the subsolar magnetopause. A mixture of length scales caused by a mixture of ion temperatures has significant effects on the Hall physics of magnetic reconnection.

Place, publisher, year, edition, pages
Blackwell Publishing, 2016. Vol. 43, no 13, 6705-6712 p.
Keyword [en]
magnetic reconnection, magnetopause, electric fields, Hall current
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-193461DOI: 10.1002/2016GL069665ISI: 000380901600004Scopus ID: 2-s2.0-84979025540OAI: oai:DiVA.org:kth-193461DiVA: diva2:1034548
Funder
Swedish National Space Board, SNSB 139/12Swedish National Space Board, SNSB 164/14
Note

QC 20161012

Available from: 2016-10-12 Created: 2016-10-03 Last updated: 2017-11-29Bibliographically approved

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