Plasma waves in Jupiter's high-latitude regions: Observations from the Juno spacecraft

S. S. Tetrick; D. A. Gurnett; W. S. Kurth; M. Imai; G. B. Hospodarsky; S. J. Bolton; J. E. P. Connerney; S. M. Levin; B. H. Mauk

doi:10.1002/2017GL073073

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Plasma waves in Jupiter's high-latitude regions: Observations from the Juno spacecraft

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Plasma waves in Jupiter's high-latitude regions: Observations from the Juno spacecraft

S. S. Tetrick, D. A. Gurnett, W. S. Kurth, M. Imai, G. B. Hospodarsky, S. J. Bolton, J. E. P. Connerney, S. M. Levin and B. H. Mauk

Geophysical research letters, Vol.44(10), pp.4447-4454

05/28/2017

DOI: 10.1002/2017GL073073

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Abstract

The Juno Waves instrument detected a new broadband plasma wave emission (similar to 50 Hz to 40 kHz) on 27 August 2016 as the spacecraft passed over the low-altitude polar regions of Jupiter. We investigated the characteristics of this emission and found similarities to whistler mode auroral hiss observed at Earth, including a funnel-shaped frequency-time feature. The electron cyclotron frequency is much higher than both the emission frequency and local plasma frequency, which is assumed to be similar to 20-40 kHz. The E/cB ratio was about three near the start of the event and then decreased to one for the rest of the period. A correlation of the electric field spectral density with the flux of an upgoing 20 to 800 keV electron beam was found, with a correlation coefficient of 0.59. We conclude that the emission is propagating in the whistler mode and is driven by the energetic upgoing electron beam.

Geology

Geosciences, Multidisciplinary

Physical Sciences

Science & Technology

Details

Title: Subtitle: Plasma waves in Jupiter's high-latitude regions: Observations from the Juno spacecraft
Creators: S. S. Tetrick - University of Iowa
D. A. Gurnett - University of Iowa
W. S. Kurth - University of Iowa
M. Imai - University of Iowa
G. B. Hospodarsky - University of Iowa
S. J. Bolton - Southwest Research Institute
J. E. P. Connerney - Goddard Space Flight Center
S. M. Levin - Jet Propulsion Laboratory
B. H. Mauk - Johns Hopkins University Applied Physics Laboratory
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.44(10), pp.4447-4454
DOI: 10.1002/2017GL073073
ISSN: 0094-8276
eISSN: 1944-8007
Publisher: Amer Geophysical Union
Number of pages: 8
Grant note: 699041X / NASA; National Aeronautics & Space Administration (NASA) Southwest Research Institute
Language: English
Date published: 05/28/2017
Academic Unit: Physics and Astronomy
Record Identifier: 9984455262902771

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