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The Angular Distribution of Lower Band Chorus Waves Near Plasmaspheric Plumes
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SYSNO ASEP 0557815 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Angular Distribution of Lower Band Chorus Waves Near Plasmaspheric Plumes Author(s) Hartley, D. P. (US)
Chen, L. (US)
Christopher, I. W. (US)
Kletzing, C. A. (US)
Santolík, Ondřej (UFA-U) RID, ORCID
Li, W. (US)
Shi, R. (CN)Number of authors 7 Article number e2022GL098710 Source Title Geophysical Research Letters. - : Wiley - ISSN 0094-8276
Roč. 49, č. 9 (2022)Number of pages 11 s. Language eng - English Country US - United States Keywords whistler-mode waves ; allen probes observations ; outer radiation belt ; statistical-analysis ; sheath impedance ; hiss ; origin ; propagation ; themis ; power 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 000796531800001 EID SCOPUS 85130092741 DOI 10.1029/2022GL098710 Annotation Plumes have been identified as an access region for chorus waves to enter the plasmasphere. Here, for the first time, chorus wave properties are parameterized by distance from the plume boundary. Case studies and statistical analysis indicate that the polar wave vector angle, theta(k), of chorus becomes more oblique near the plume edge. Occurrence rates of theta(k) > 35 degrees on the plume boundary are approximately double that observed further away from the plume. Whilst the increase in theta(k) is apparent on both plume edges, the distribution of theta(k) exhibits different behavior between the Eastward and Westward boundaries. In general, the distribution of azimuthal wave vector angles, phi(k), is symmetric about the anti-Earthwards direction. However, near the Eastward plume boundary, an Eastwards skew of phi(k) is reported. This result provides new insight on chorus propagation in the context of the chorus-to-hiss mechanism, and has implications for quantifying wave-particle interactions in the near-plume region. 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 2023 Electronic address https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL098710
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