Effect of an Interplanetary Coronal Mass Ejection on Saturn's Radio Emission - Observatoire de Paris Accéder directement au contenu
Article Dans Une Revue Frontiers in Astronomy and Space Sciences Année : 2022

Effect of an Interplanetary Coronal Mass Ejection on Saturn's Radio Emission

Résumé

The Saturn Kilometric Radiation (SKR) was observed for the first time during the flyby of Saturn by the Voyager spacecraft in 1980. These radio emissions, in the range of a few kHz to 1 MHz, are emitted by electrons travelling around auroral magnetic field lines. Their study is useful to understand the variability of a magnetosphere and its coupling with the solar wind. Previous studies have shown a strong correlation between the solar wind dynamic pressure and the SKR intensity. However, up to now, the effect of an Interplanetary Coronal Mass Ejection (ICME) has never been examined in detail, due to the lack of SKR observations at the time when an ICME can be tracked and its different parts be clearly identified. In this study, we take advantage of a large ICME that reached Saturn mid-November 2014 (Witasse et al., J. Geophys. Res. Space Physics, 2017, 122, 7865-7890). At that time, the Cassini spacecraft was fortunately travelling within the solar wind for a few days, and provided a very accurate timing of the ICME structure. A survey of the Cassini data for the same period indicated a significant increase in the SKR emissions, showing a good correlation after the passage of the ICME shock with a delay of ∼13 h and after the magnetic cloud passage with a delay of 25-42 h.
Fichier principal
Vignette du fichier
Cecconi_2022_1.pdf (43.92 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

obspm-03684476 , version 1 (01-06-2022)

Identifiants

Citer

Baptiste Cecconi, Olivier Witasse, C Jackman, B Sánchez-Cano, M Mays. Effect of an Interplanetary Coronal Mass Ejection on Saturn's Radio Emission. Frontiers in Astronomy and Space Sciences, 2022, ⟨10.3389/fspas.2022.800279⟩. ⟨obspm-03684476⟩
18 Consultations
20 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More