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Quadrupolar pattern of the asymmetric guide-field reconnection
Beihang Univ, Sch Space & Environm, Beijing, Peoples R China..
Beihang Univ, Sch Space & Environm, Beijing, Peoples R China..
Beihang Univ, Sch Space & Environm, Beijing, Peoples R China..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.ORCID iD: 0000-0002-1046-746X
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2017 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 122, no 6, 6349-6356 p.Article in journal (Refereed) Published
Abstract [en]

With high-resolution data of the recently launched Magnetospheric Multiscale mission, we report a magnetic reconnection event at the dayside magnetopause. This reconnection event, having a density asymmetry N-high/N-low approximate to 2 on the two sides of the reconnecting current sheet and a guide field B-g approximate to 0.4B(0) in the out-of-plane direction, exhibit all the two-fluid features: Alfvenic plasma jets in the outflow region, bipolar Hall electric fields toward the current sheet center, quadrupolar Hall magnetic fields in the out-of-plane direction, and the corresponding Hall currents. Obviously, the density asymmetry N-high/N-low approximate to 2 and the guide field B-g approximate to 0.4B(0) are not sufficient to dismiss the quadrupolar pattern of Hall reconnection. This is different from previous simulations, where the bipolar pattern of Hall reconnection was suggested.

Place, publisher, year, edition, pages
2017. Vol. 122, no 6, 6349-6356 p.
Keyword [en]
reconnection at magnetopause, number density asymmetry, moderate guide field, Alfvenic plasma jet, quadrupolar Hall pattern
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-331893DOI: 10.1002/2016JA023666ISI: 000405534800030OAI: oai:DiVA.org:uu-331893DiVA: diva2:1152350
Available from: 2017-10-24 Created: 2017-10-24 Last updated: 2017-10-24Bibliographically approved

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Graham, Daniel B.Khotyaintsev, Yuri V.André, Mats
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