Reflection and Refraction of the L-O Mode 5 kHz Saturn Narrowband Emission by the Magnetosheath
- 1Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, People's Republic of China
- 2Space Research Institute, Austrian Academy of Sciences, Graz, Austria
- 3School of Cosmic Physics, Dublin Institute for Advanced Studies, Dublin, Ireland
- 4Department of Physics and Astronomy, University of Iowa, Iowa City, IA, USA
- 5LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris Meudon, Paris, France
- 6Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan, People's Republic of China
The reflection-by-sheath mechanism of 5 kHz narrowband emissions (NB) at Saturn is confirmed by Cassini observations during several crossings of the magnetopause, which show that the 5 kHz NB can be prevented from escaping Saturn's magnetosphere. The L-O mode 5 kHz NB remained visible in areas of low plasma density but disappeared in regions of high plasma density. In three cases, NB disappeared immediately after the crossings of Saturn's magnetopause. A possible reflected NB event observed near the magnetosheath is discussed. This mechanism can help explain the 5 kHz NB observed at low latitudes outside the Enceladus plasma torus and their upper frequency limit variations. This mechanism significantly improves the current understanding of the 5 kHz NB.
How to cite: Wu, S., Ye, S., Fischer, G., Jackman, C., Wang, J., Menietti, J., Cecconi, B., and Long, M.: Reflection and Refraction of the L-O Mode 5 kHz Saturn Narrowband Emission by the Magnetosheath , Europlanet Science Congress 2022, Granada, Spain, 18–23 Sep 2022, EPSC2022-321, https://doi.org/10.5194/epsc2022-321, 2022.
