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Transmission of foreshock waves through Earth’s bow shock
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SYSNO ASEP 0565946 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Transmission of foreshock waves through Earth’s bow shock Author(s) Turc, L. (FI)
Roberts, O. W. (AT)
Verscharen, D. (GB)
Dimmock, A.P. (SE)
Kajdic, P. (MX)
Palmroth, M. (FI)
Pfau-Kempf, Y. (FI)
Johlander, A. (FI)
Dubart, M. (FI)
Kilpua, E. K. J. (FI)
Souček, Jan (UFA-U) RID, ORCID
Takahashi, K. (US)
Takahashi, N. (JP)
Battarbee, M. (FI)
Ganse, U. (FI)Number of authors 15 Source Title Nature Physics. - : Nature Publishing Group - ISSN 1745-2473
Roč. 19, č. 1 (2023), s. 78-86Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords quasi-parallel shocks ; low-frequency waves ; solar-wind ; upstream ; pulsations ; propagation ; simulation ; magnetosheath Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Method of publishing Open access Institutional support UFA-U - RVO:68378289 UT WOS 000900797200001 EID SCOPUS 85144329225 DOI 10.1038/s41567-022-01837-z Annotation The Earth’s magnetosphere and its bow shock, which is formed by the interaction of the supersonic solar wind with the terrestrial magnetic field, constitute a rich natural laboratory enabling in situ investigations of universal plasma processes. Under suitable interplanetary magnetic field conditions, a foreshock with intense wave activity forms upstream of the bow shock. So-called 30 s waves, named after their typical period at Earth, are the dominant wave mode in the foreshock and play an important role in modulating the shape of the shock front and affect particle reflection at the shock. These waves are also observed inside the magnetosphere and down to the Earth’s surface, but how they are transmitted through the bow shock remains unknown. By combining state-of-the-art global numerical simulations and spacecraft observations, we demonstrate that the interaction of foreshock waves with the shock generates earthward-propagating, fast-mode waves, which reach the magnetosphere. These findings give crucial insight into the interaction of waves with collisionless shocks in general and their impact on the downstream medium. 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 2024 Electronic address https://www.nature.com/articles/s41567-022-01837-z
Number of the records: 1