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Magnetic reconnection and modification of the Hall physics due to cold ions at the magnetopause
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
European Space Agcy ESAC, Madrid, Spain..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
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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
2016. Vol. 43, no 13, 6705-6712 p.
Keyword [en]
magnetic reconnection, magnetopause, electric fields, Hall current
National Category
Geophysics Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-304452DOI: 10.1002/2016GL069665ISI: 000380901600004OAI: oai:DiVA.org:uu-304452DiVA: diva2:1033003
Funder
Swedish National Space Board, SNSB 139/12 164/14 176/15
Available from: 2016-10-05 Created: 2016-10-05 Last updated: 2017-11-30Bibliographically approved

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Norgren, Cecilia

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André, MatsLi, WenyaKhotyaintsev, Yuri V.Vaivads, AndrisGraham, Daniel B.Norgren, Cecilia
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Swedish Institute of Space Physics, Uppsala DivisionSpace Plasma Physics
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Geophysical Research Letters
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