A persistent, large‐scale, and ordered electrodynamic connection between Saturn and its main rings

0506068 - ÚFA 2020 RIV US eng J - Článek v odborném periodiku
Sulaiman, A. H. - Farrell, W.M. - Ye, S. - Y. - Kurth, W. S. - Gurnett, D. A. - Hospodarsky, G. B. - Menietti, J. D. - Píša, David - Hunt, G.J. - Agiwal, O. - Dougherty, M. K.
A persistent, large‐scale, and ordered electrodynamic connection between Saturn and its main rings.
Geophysical Research Letters. Roč. 46, č. 13 (2019), s. 7166-7172. ISSN 0094-8276. E-ISSN 1944-8007
Grant CEP: GA ČR(CZ) GA17-08772S
Institucionální podpora: RVO:68378289
Klíčová slova: Saturn * Grand Finale * Rings * Plasma Waves * auroral hiss emissions * mode radiation * ionosphere
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 4.497, rok: 2019
Způsob publikování: Omezený přístup
https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019GL083541

Auroral hiss emissions are ubiquitous in planetary magnetospheres, particularly in regions where electric current systems are present. They are generally diagnostic of electrodynamic coupling between conductive bodies, thus making auroral and moon‐connected magnetic field lines prime locations for their detection. However, the role of Saturn's rings as a dynamic conductive body has been elusive and of great interest to the community. Cassini's Grand Finale orbits afforded a unique opportunity to directly sample magnetic field lines connected to the main rings. Here we provide strong evidence for the persistent and organized presence of auroral hiss demonstrably associated with the main rings. This is in contrast to recent observations suggesting Saturn's rings may be barriers to field‐aligned currents. Our results provide a new view of Saturn's rings as a dynamic system that is in continuous and ordered electrodynamic coupling with the planet.
Trvalý link: http://hdl.handle.net/11104/0297355