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Shape of the dayside equatorial magnetopause
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SYSNO ASEP 0474176 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Shape of the dayside equatorial magnetopause Author(s) Šimůnek, Jiří (UFA-U) RID, ORCID
Šafránková, J. (CZ)
Němeček, Z. (CZ)
Přech, L. (CZ)Source Title Geophysical Research Abstracts. - Göttingen : European Geosciences Union, 2017 - ISSN 1607-7962
EGU2017-13062Number of pages 1 s. Publication form Online - E Action EGU General Assembly 2017 Event date 23.04.2017 - 28.04.2017 VEvent location Vienna Country AT - Austria Event type WRD Language eng - English Country DE - Germany Keywords THEMIS spacecraft ; magnetopause ; solar wind Subject RIV BL - Plasma and Gas Discharge Physics Institutional support UFA-U - RVO:68378289 Annotation A magnetopause location is generally believed to be determined by the solar wind
dynamic pressure and by a sign and value of the interplanetary magnetic field (IMF)
vertical (Bz) component. The contribution of other parameters is usually considered
to be minor or negligible near the equatorial plane. A great majority of present
magnetopause models describes the magnetopause shape with an ellipsoid or paraboloid
of revolution. The axis of such surface usually reflects the Earth orbital motion
around the Sun. Ten years of magnetopause observations near the equatorial plane by
the THEMIS spacecraft allow to tests of this description and facilitates search for
a better approximation of the magnetopause shape. We present a statistical study
based on more than several thousand magnetopause crossings identified in the THEMIS
data. The study accounts for a dependence of the magnetopause location on the
upstream solar wind dynamic pressure and expects that all other effects can be
averaged. The study suggests a very simple expression for the shape of the dayside
magnetopause and examines the influence of IMF and solar wind parameters on this
shape. The effects of magnetospheric current systems are also discussed.Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2018
Number of the records: 1