Auroral Hiss Emissions During Cassini's Grand Finale: Diverse Electrodynamic Interactions Between Saturn and Its Rings

0489262 - ÚFA 2019 RIV US eng J - Článek v odborném periodiku
Sulaiman, A. H. - Kurth, W. S. - Hospodarsky, G. B. - Averkamp, T. F. - Persoon, A. M. - Menietti, J. D. - Ye, S. - Y. - Gurnett, D. A. - Píša, David - Farrell, W.M. - Dougherty, M. K.
Auroral Hiss Emissions During Cassini's Grand Finale: Diverse Electrodynamic Interactions Between Saturn and Its Rings.
Geophysical Research Letters. Roč. 45, č. 14 (2018), s. 6782-6789. ISSN 0094-8276. E-ISSN 1944-8007
Grant CEP: GA ČR GJ16-16050Y
Institucionální podpora: RVO:68378289
Klíčová slova: Saturn * Ionosphere * Auroral Hiss * Rings
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 4.578, rok: 2018
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018GL077875

The Cassini Grand Finale orbits offered a new view of Saturn and its environment owing to multiple orbits of unprecedented proximity to the planet and high inclination. The Radio and Plasma Wave Science instrument detected striking signatures of plasma waves in the southern hemisphere. These all propagate in the whistler mode and are classified as: 1) A filled funnel‐shaped emission, commonly known as auroral hiss. Here however, our analysis indicates they are likely associated with currents connected to the rings. 2) First observations of VLF saucers directly linked to the planet on field lines also connected to the rings. The latter observations are unique to low altitude orbits and their presence at the Earth and Saturn alike show that they are fundamental plasma waves in planetary ionospheres. Our results give an insight, from a unique perspective, into the dynamic and diverse nature of Saturn's environment.
Trvalý link: http://hdl.handle.net/11104/0283705