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Tail reconnection in the global magnetospheric context: Vlasiator first results

Sanni Hoilijoki; Tuija I. Pulkkinen; Sebastian von Alfthan; Liisa Juusola; Heli Hietala; Urs Ganse; Rami Vainio; Minna Palmroth; Michael Hesse; Yann Pfau-Kempf

dc.contributor.authorSanni Hoilijoki
dc.contributor.authorTuija I. Pulkkinen
dc.contributor.authorSebastian von Alfthan
dc.contributor.authorLiisa Juusola
dc.contributor.authorHeli Hietala
dc.contributor.authorUrs Ganse
dc.contributor.authorRami Vainio
dc.contributor.authorMinna Palmroth
dc.contributor.authorMichael Hesse
dc.contributor.authorYann Pfau-Kempf
dc.date.accessioned2022-10-27T11:49:38Z
dc.date.available2022-10-27T11:49:38Z
dc.identifier.urihttps://www.utupub.fi/handle/10024/155221
dc.description.abstractThe key dynamics of the magnetotail have been researched for decades and have been associated with either three-dimensional (3-D) plasma instabilities and/or magnetic reconnection. We apply a global hybrid-Vlasov code, Vlasiator, to simulate reconnection self-consistently in the ion kinetic scales in the noon-midnight meridional plane, including both dayside and nightside reconnection regions within the same simulation box. Our simulation represents a numerical experiment, which turns off the 3-D instabilities but models ion-scale reconnection physically accurately in 2-D. We demonstrate that many known tail dynamics are present in the simulation without a full description of 3-D instabilities or without the detailed description of the electrons. While multiple reconnection sites can coexist in the plasma sheet, one reconnection point can start a global reconfiguration process, in which magnetic field lines become detached and a plasmoid is released. As the simulation run features temporally steady solar wind input, this global reconfiguration is not associated with sudden changes in the solar wind. Further, we show that lobe density variations originating from dayside reconnection may play an important role in stabilising tail reconnection.
dc.language.isoen
dc.publisherCOPERNICUS GESELLSCHAFT MBH
dc.titleTail reconnection in the global magnetospheric context: Vlasiator first results
dc.identifier.urnURN:NBN:fi-fe2021042717748
dc.relation.volume35
dc.contributor.organizationfi=avaruustutkimuslaboratorio|en=Space Research Laboratory|
dc.contributor.organization-code2606702
dc.converis.publication-id27886624
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/27886624
dc.format.pagerange1274
dc.format.pagerange1269
dc.identifier.jour-issn0992-7689
dc.okm.affiliatedauthorVainio, Rami
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeJournal article
dc.publisher.countryGermanyen_GB
dc.publisher.countrySaksafi_FI
dc.publisher.country-codeDE
dc.relation.doi10.5194/angeo-35-1269-2017
dc.relation.ispartofjournalAnnales Geophysicae
dc.relation.issue6
dc.year.issued2017


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