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On Multiple Reconne...
On Multiple Reconnection X-Lines and Tripolar Perturbations of Strong Guide Magnetic Fields
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Eriksson, S. (author)
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Lapenta, G. (author)
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Newman, D. L. (author)
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Phan, T. D. (author)
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Gosling, J. T. (author)
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Lavraud, B. (author)
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- Khotyaintsev, Yu. V. (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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Carr, C. M. (author)
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- Markidis, Stefano (author)
- KTH,High Performance Computing and Visualization (HPCViz)
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Goldman, M. V. (author)
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(creator_code:org_t)
- 2015
- 2015
- English.
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In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 805:1
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- We report new multi-spacecraft Cluster observations of tripolar guide magnetic field perturbations at a solar wind reconnection exhaust in the presence of a guide field B-M. which is almost four times as strong as the reversing field B-L. The novel tripolar field consists of two narrow regions of depressed B-M, with an observed 7%-14% Delta B-M magnitude relative to the external field, which are found adjacent to a wide region of enhanced BM within the exhaust. A stronger reversing field is associated with each B-M depression. A kinetic reconnection simulation for realistic solar wind conditions and the observed strong guide field reveals that tripolar magnetic fields preferentially form across current sheets in the presence of multiple X-lines as magnetic islands approach one another and merge into fewer and larger islands. The simulated Delta B-M/Delta X-N over the normal width Delta X-N between a B-M minimum and the edge of the external region agree with the normalized values observed by Cluster. We propose that a tripolar guide field perturbation may be used to identify candidate regions containing multiple X-lines and interacting magnetic islands at individual solar wind current sheets with a strong guide field.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Magnetic reconnection
- Plasmas
- Solar wind
- Sun: heliosphere
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Eriksson, S.
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Lapenta, G.
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Newman, D. L.
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Phan, T. D.
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Gosling, J. T.
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Lavraud, B.
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show more...
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Khotyaintsev, Yu ...
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Carr, C. M.
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Markidis, Stefan ...
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Goldman, M. V.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Astrophysical Jo ...
- By the university
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Royal Institute of Technology
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Uppsala University