Ray-Tracing Analysis for the Propagation of Saturn Narrowband Emission Within the Saturnian Magnetosphere

0585282 - ÚFA 2025 RIV US eng J - Článek v odborném periodiku
Wu, S. - Taubenschuss, Ulrich - Ye, S. - Fischer, G. - Cecconi, B. - Wang, M. - Tao, T. - Long, M. - Lu, P. - Liu, Y. - Kurth, W. S. - Jackman, C. M. - Zarka, P. - Baskevitch, C. - Feng, X.
Ray-Tracing Analysis for the Propagation of Saturn Narrowband Emission Within the Saturnian Magnetosphere.
Journal of Geophysical Research: Planets. Roč. 129, č. 4 (2024), č. článku e2023JE008118. ISSN 2169-9097. E-ISSN 2169-9100
Grant CEP: GA ČR(CZ) GF20-06802L
Institucionální podpora: RVO:68378289
Klíčová slova: intense electrostatic-waves * radio * Raytracing * radio emission * Saturn * magnetosphere * mode conversion * propagation
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 4.8, rok: 2022
Způsob publikování: Omezený přístup
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023JE008118

This study investigates the propagation characteristics of Saturn's Narrowband (NB) emissions using a 3D ray-tracing code incorporating Saturn's magnetic field and electron density parameters. The potential source regions and propagation zones of the L-O mode, Z mode and whistler mode NB emissions are distinguished. The L-O mode NB emissions, generated along local electron plasma frequency surfaces through mode conversion, exhibit straight-line propagation but undergo reflections between the ionosphere, the plasma torus, and the magnetosheath. The slot region, characterized by a lower electron density distributed around the plasma torus boundary, significantly influences emission propagation, potentially leading to trapping and depolarization. The 5 kHz Z mode NB emissions propagate and fill the trapping region delineated by lower cut-off and upper hybrid resonance frequencies. In contrast, the 20 kHz Z mode NB emissions are primarily confined near source regions at the north and south edges of the plasma torus, with the possibility of escaping under variable plasma conditions.
Trvalý link: https://hdl.handle.net/11104/0353011


Vědecká data: Zenodo