Počet záznamů: 1
Statistical study of influence of ULF waves and their compressibility on the solar wind velocity in the Earth’s foreshock
- 1.0503861 - ÚFA 2020 DE eng A - Abstrakt
Urbář, Jaroslav - Němeček, Z. - Šafránková, J. - Přech, L.
Statistical study of influence of ULF waves and their compressibility on the solar wind velocity in the Earth’s foreshock.
Geophysical Research Abstracts. Vol. 21. Göttingen: European Geosciences Union, 2019. EGU2019-5385.
[EGU General Assembly 2019. 07.04.2019-12.04.2019, Vienna]
Institucionální podpora: RVO:68378289
Klíčová slova: solar wind * foreshock * ultra low frequency (ULF) waves * THEMIS mission
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Obor OECD: Fluids and plasma physics (including surface physics)
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.
Trvalý link: http://hdl.handle.net/11104/0295632
Počet záznamů: 1