Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Blanco-Cano, Xochitl Battarbee, Markus Turc, Lucile Dimmock, Andrew P. Kilpua, Emilia K.J. Hoilijoki, Sanni Ganse, Urs Sibeck, David G. Cassak, Paul A. Fear, Robert C. Jarvinen, Riku Juusola, Liisa Pfau-Kempf, Yann Vainio, Rami Palmroth, Minna 2018-08-23T10:58:49Z 2018-08-23T10:58:49Z 2018-08-08
dc.identifier.citation Blanco-Cano , X , Battarbee , M , Turc , L , Dimmock , A P , Kilpua , E K J , Hoilijoki , S , Ganse , U , Sibeck , D G , Cassak , P A , Fear , R C , Jarvinen , R , Juusola , L , Pfau-Kempf , Y , Vainio , R & Palmroth , M 2018 , ' Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation ' Annales Geophysicae , vol 36 , no. 4 , pp. 1081-1097 . DOI: 10.5194/angeo-36-1081-2018 en
dc.identifier.issn 0992-7689
dc.identifier.issn 1432-0576
dc.identifier.other PURE UUID: b752b44e-6393-4ac2-8d66-7a10de9ca987
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description.abstract In this paper we present the first identification of foreshock cavitons and the formation of spontaneous hot flow anomalies (SHFAs) with the Vlasiator global magnetospheric hybrid-Vlasov simulation code. In agreement with previous studies we show that cavitons evolve into SHFAs. In the presented run, this occurs very near the bow shock. We report on SHFAs surviving the shock crossing into the downstream region and show that the interaction of SHFAs with the bow shock can lead to the formation of a magnetosheath cavity, previously identified in observations and simulations. We report on the first identification of long-term local weakening and erosion of the bow shock, associated with a region of increased foreshock SHFA and caviton formation, and repeated shock crossings by them. We show that SHFAs are linked to an increase in suprathermal particle pitch-angle spreads. The realistic length scales in our simulation allow us to present a statistical study of global caviton and SHFA size distributions, and theircomparable size distributions support the theory that SHFAs are formed from cavitons. Virtual spacecraft observations are shown to be in good agreement with observational studies. en
dc.format.extent 17
dc.format.extent 1081-1097
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Annales Geophysicae en
dc.relation.ispartofseries Volume 36, issue 4 en
dc.rights openAccess en
dc.subject.other Astronomy and Astrophysics en
dc.subject.other Geology en
dc.subject.other Atmospheric Science en
dc.subject.other Earth and Planetary Sciences (miscellaneous) en
dc.subject.other Space and Planetary Science en
dc.subject.other 1171 Geosciences en
dc.title Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Universidad Nacional Autonoma de Mexico
dc.contributor.department University of Helsinki
dc.contributor.department Department of Electronics and Nanoengineering
dc.contributor.department University of Colorado Boulder
dc.contributor.department NASA Goddard Space Flight Center
dc.contributor.department West Virginia University
dc.contributor.department University of Southampton
dc.contributor.department University of Turku
dc.subject.keyword Astronomy and Astrophysics
dc.subject.keyword Geology
dc.subject.keyword Atmospheric Science
dc.subject.keyword Earth and Planetary Sciences (miscellaneous)
dc.subject.keyword Space and Planetary Science
dc.subject.keyword 1171 Geosciences
dc.identifier.urn URN:NBN:fi:aalto-201808234722
dc.identifier.doi 10.5194/angeo-36-1081-2018
dc.type.version publishedVersion

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