Universität zu Köln

Sulaiman, A. H., Hospodarsky, G. B., Elliott, S. S., Kurth, W. S., Gurnett, D. A., Imai, M., Allegrini, F., Bonfond, B., Clark, G., Connerney, J. E. P., Ebert, R. W., Gershman, D. J., Hue, V, Janser, S., Kotsiaros, S., Paranicas, C., Santolik, O., Saur, J., Szalay, J. R. and Bolton, S. J. (2020). Wave-Particle Interactions Associated With Io's Auroral Footprint: Evidence of Alfven, Ion Cyclotron, and Whistler Modes. Geophys. Res. Lett., 47 (22). WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 1944-8007

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Abstract

The electrodynamic coupling between Io and Jupiter gives rise to wave-particle interactions across multiple spatial scales. Here we report observations during Juno's 12th perijove (PJ) high-latitude northern crossing of the flux tube connected to Io's auroral footprint. We focus on plasma wave measurements, clearly differentiating between magnetohydrodynamic (MHD), ion, and electron scales. We find (i) evidence of Alfven waves undergoing a turbulent cascade, suggesting Alfvenic acceleration processes together with observations of bi-directional, broadband electrons; (ii) intense ion cyclotron waves with an estimated heating rate that is consistent with the generation of ion conics reported by Clark et al. (2020, ); and (iii) whistler-mode auroral hiss radiation excited by field-aligned electrons. Such high-resolution wave and particle measurements provide an insight into satellite interactions in unprecedented detail. We further anticipate that these spatially well-constrained results can be more broadly applied to better understand processes of Jupiter's main auroral oval.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sulaiman, A. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hospodarsky, G. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Elliott, S. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kurth, W. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gurnett, D. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Imai, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Allegrini, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bonfond, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Clark, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Connerney, J. E. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ebert, R. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gershman, D. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hue, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Janser, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kotsiaros, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paranicas, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Santolik, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Saur, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Szalay, J. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bolton, S. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-310656
DOI:	10.1029/2020GL088432
Journal or Publication Title:	Geophys. Res. Lett.
Volume:	47
Number:	22
Date:	2020
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	1944-8007
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HISS EMISSIONS; ELECTRON ACCELERATION; JUNO OBSERVATIONS; SATURN; MAGNETOSPHERE; SCALE; TAIL Multiple languages Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/31065