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Statistical study of influence of ULF waves and their compressibility on the solar wind velocity in the Earth’s foreshock
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SYSNO ASEP 0503861 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 Statistical study of influence of ULF waves and their compressibility on the solar wind velocity in the Earth’s foreshock Author(s) Urbář, Jaroslav (UFA-U) RID, ORCID
Němeček, Z. (CZ)
Šafránková, J. (CZ)
Přech, L. (CZ)Number of authors 4 Source Title Geophysical Research Abstracts, EGU General Assembly 2018, Vol. 21. - Göttingen : European Geosciences Union, 2019
EGU2019-5385Number of pages 1 s. Publication form Online - E Action EGU General Assembly 2019 Event date 07.04.2019 - 12.04.2019 VEvent location Vienna Country AT - Austria Event type WRD Language eng - English Country DE - Germany Keywords solar wind ; foreshock ; ultra low frequency (ULF) waves ; THEMIS mission Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Institutional support UFA-U - RVO:68378289 Annotation The parameters of solar wind (SW) ion populations are modified upstream the Earth’s bow shock, in the ion foreshock region, which is typically observed ahead of the quasi-parallel bow shock. The interaction of the incoming SW with the ions reflected at the bow shock generate ULF waves, among them fast magnetosonic waves with an in-phase relationship between the ion flux and magnetic field fluctuations. Using cautiously selected SW proton population from the THEMIS ion 3D distributions, we present statistical maps of a modification of the SW proton velocity due to foreshock processes. We evaluated both electric and magnetic field fluctuation levels associated with ULF waves and their compressibility. A special attention is devoted to evaluation of a contribution of alpha particles to the proton moments using intervals of the solar wind unaffected by the foreshock processes. 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 2020
Number of the records: 1