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Retreat and reformation of X-line during quasi-continuous tailward-of-the-cusp reconnection under northward IMF
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.
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2008 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 35, no 15, L15104- p.Article in journal (Refereed) Published
Abstract [en]

We present observations on 19-20 November 2006 by the Cluster spacecraft that were skimming the high-latitude dusk-flank magnetopause, which are consistent with more than one reconnection X-line present on the tailward side of the cusp under northward IMF. Evidence of quasi-continuous reconnection over 16 hours exists in the form of Alfvenic acceleration of magnetosheath ions found almost always when either of the satellites traversed the boundary. The data indicate that a dominant X-line was sunward of Cluster for most of the time, but ion velocity distributions consisting of two magnetosheath populations demonstrate that for part of the time, more than one X-line existed. Further, the motion of reconnected field lines shows that some X-line(s) retreated tailward. It is inferred that following the X-line retreat, another X-line reformed sunward of Cluster, leading tomultiple X-lines.

Place, publisher, year, edition, pages
2008. Vol. 35, no 15, L15104- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-149351DOI: 10.1029/2008GL034767ISI: 000258338400003OAI: oai:DiVA.org:uu-149351DiVA: diva2:404696
Available from: 2011-03-18 Created: 2011-03-18 Last updated: 2017-12-11Bibliographically approved

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Vaivads, Andris

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