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Magnetic flux rope formation within a magnetosheath hot flow anomaly


Metadata FieldValueLanguage
dc.creatorHasegawa, H.
dc.creatorZhang, H.
dc.creatorLin, Y.
dc.creatorSonnerup, B. U. O.
dc.creatorSchwartz, S. J.
dc.creatorLavraud, B.
dc.creatorZong, Q. -G.
dc.date.accessioned2020-06-09T20:33:07Z
dc.date.available2020-06-09T20:33:07Z
dc.date.created2012-09
dc.identifier10.1029/2012JA017920en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2012JA017920en_US
dc.identifier.urihttp://hdl.handle.net/11200/49873
dc.description.abstractWe report observations on 1 March 2004 by the Cluster spacecraft of a hot flow anomaly (HFA) encountered in the dayside magnetosheath near Earth's bow shock. Embedded within the HFA was a magnetic flux rope with a diameter of a few thousand km, which was moving sunward and was presumably expanding. The pristine upstream solar wind seen by the ACE spacecraft contains an interplanetary current sheet favorable for the HFA formation, but shows no flux rope signatures. The properties of the flux rope, such as its slow speed, magnetic field variations, and the absence of magnetospheric electrons, are not likely to be due to magnetopause flux transfer events. These results suggest that the flux rope was created in the magnetosheath, rather than in the solar wind, in the foreshock, or on the magnetopause, through magnetic reconnection initiated in the course of the HFA development. Interestingly, energetic (similar to 100 keV) electron fluxes were enhanced in and around this HFA-associated flux rope. The observations indicate that reconnection can occur within the magnetosheath part of HFAs and that such reconnection may play a role in electron acceleration, which is a common feature of HFAs.en_US
dc.formatPDFen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.relation.ispartofJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICSen_US
dc.relation.ispartofseries2169-9380en_US
dc.subjectEARTHS BOW SHOCK; DIAMAGNETIC CAVITIES UPSTREAM; SOLAR-WIND; MAGNETOPAUSE SHAPE; CLUSTER DATA; PLASMAen_US
dc.titleMagnetic flux rope formation within a magnetosheath hot flow anomalyen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume117en_US
dc.description.statusPublisheden_US
dc.creator.orcid0000-0001-8003-9252en_US

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