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dc.contributor.authorØstgaard, Nikolai
dc.contributor.authorSnekvik, Kristian
dc.contributor.authorBorg, Anette Lauen
dc.contributor.authorÅsnes, Arne
dc.contributor.authorPedersen, Arne
dc.contributor.authorØieroset, Marit
dc.contributor.authorPhan, Tai D.
dc.contributor.authorHaaland, Stein
dc.date.accessioned2017-12-18T13:02:56Z
dc.date.available2017-12-18T13:02:56Z
dc.date.issued2009-06
dc.identifier.citationØstgaard N, Snekvik K, Borg, Åsnes A, Pedersen A, Øieroset M, Phan TD, Haaland SE. Can magnetotail reconnection produce the auroral intensities observed in the conjugate ionosphere? Journal of Geophysical Research - Space Physics. 2009;114:A06204eng
dc.identifier.urihttp://hdl.handle.net/1956/17012
dc.description.abstract[1] In a recent case study, Borg et al. (2007) reported that an inverted V structure, caused by a field-aligned potential drop of 30 kV producing very strong X-ray aurora, was found in connection with tail reconnection. However, the in situ particle measurements indicated clearly that the particles responsible for the X-ray aurora were not accelerated by the reconnection process. In this article, we report the predicted auroral intensities of thirteen reconnection events where Cluster passed through the reconnection region. For six of the events, global auroral imaging data were available and the predicted auroral intensities could be compared with the observed intensities. Our main findings are as follows: (1) Acceleration in the reconnection region is generally not sufficient to account for the observed auroral intensities. (2) Additional acceleration between the reconnection region and the ionosphere is needed to explain the auroral intensities. Although we see signatures that point toward potential drops at the flanks of bursty bulk flows (BBFs), we also find signatures of Alfvén wave accelerated electrons at 700 km and we are not able to determine the most likely acceleration mechanism. (3) The reconnection events are observed 2–14 min after substorm onset and indicate that reconnection is an expanding process observed along the poleward boundary of the aurora.eng
dc.language.isoengeng
dc.publisherAmerican Geophysical Unioneng
dc.titleCan magnetotail reconnection produce the auroral intensities observed in the conjugate ionosphere?eng
dc.typeJournal articleeng
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437
dc.subject.nsiVDP::Mathematics and natural scienses: 400::Physics: 430::Space and plasma physics: 437
dc.date.updated2017-11-06T13:56:44Z
dc.rights.holderCopyright 2009 by the American Geophysical Unioneng
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng
dc.type.documentJournal article
dc.identifier.cristinID351321
dc.identifier.doi10.1029/2009JA014185eng
dc.source.issn2169-9380eng
dc.source.issn2169-9402eng
dc.relation.journalJournal of Geophysical Research - Space Physics


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