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Survey of intense whistler-mode emissions in Saturn’s magnetosheath
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SYSNO ASEP 0477554 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 Survey of intense whistler-mode emissions in Saturn’s magnetosheath Author(s) Píša, David (UFA-U) RID, ORCID
Sulaiman, A. H. (US)
Santolík, Ondřej (UFA-U) RID, ORCID
Hospodarsky, G. B. (US)
Kurth, W. S. (US)
Gurnett, D. A. (US)Number of authors 6 Source Title MOP 2017: Programme Book. - Uppsala : Swedish Institute for Space Physics, 2017
S. 15Number of pages 1 s. Publication form Online - E Action Magnetospheres of the Outer Planets Event date 12.06.2017 - 16.06.2017 VEvent location Uppsala Country SE - Sweden Event type WRD Language eng - English Country SE - Sweden Keywords whistler mode waves ; Saturn ; magnetosphere Subject RIV BL - Plasma and Gas Discharge Physics Institutional support UFA-U - RVO:68378289 Annotation Intense whistler-mode emissions known as ”lion-roars” have been already reported by
many missions inside the terrestrial magnetosheath. Recently, we have reported the evidence
of such emissions in Saturn’s magnetosheath. We present a survey of these intense emissions
as detected by the Cassini spacecraft between years 2004 and 2010. We identified eight time
intervals with almost 37 hours of the intense lion-roar-like emissions in the low-band (up to
50 Hz) RPWS/WFR spectrogram. The emissions were observed across the day-side
magnetosheath between magnetic local times from 0730 to 1600. The emissions were
narrow-banded with a typical frequency up to 30 Hz, well below the local electron cyclotron
frequency (100 – 1000 Hz). Using the minimum variance analysis method, we show that the
waves are right hand circularly polarized and propagate at small wave normal angles (<40
degrees) with respect to the ambient magnetic field. Finally, we discuss the statistical
properties of the lion-roar-like emissions at Saturn and compare them to observations at
Earth.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
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