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In situ observations of flux rope at the separatrix region of magnetic reconnection
Wuhan Univ, Sch Elect Informat, Wuhan 430072, Peoples R China.;UPMC, Ecole Polytech, CNRS, Lab Phys Plasmas, Palaiseau, France..
UPMC, Ecole Polytech, CNRS, Lab Phys Plasmas, Palaiseau, France..
Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA..
Los Alamos Natl Lab, Los Alamos, NM USA..
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2016 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 121, no 1, 205-213 p.Article in journal (Refereed) Published
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Abstract [en]

We present the first in situ observations of a small-scale flux rope locally formed at the separatrix region of magnetic reconnection without large guide field. Bidirectional electron beams (cold and hot beams) and density cavity accompanied by intense wave activity substantiate the crossing of the separatrix region. Density compression and one parallel electron beam are detected inside the flux rope. We suggest that this flux rope is locally generated at the separatrix region due to the tearing instability within the separatrix current layer. This observation sheds new light on the 3-D picture of magnetic reconnection in space plasma.

Place, publisher, year, edition, pages
2016. Vol. 121, no 1, 205-213 p.
Keyword [en]
magnetic reconnection, flux rope, separatrix, tearing instability
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-282395DOI: 10.1002/2015JA021468ISI: 000371146900015OAI: oai:DiVA.org:uu-282395DiVA: diva2:917014
Available from: 2016-04-05 Created: 2016-04-05 Last updated: 2017-11-30Bibliographically approved

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Vaivads, Andris

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Swedish Institute of Space Physics, Uppsala DivisionSpace Plasma Physics
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