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Communication Dans Un Congrès Année : 2023

Selection of low frequency extensions of Saturn kilometric radiation

Résumé

Saturn's Kilometric Radiation is an auroral emission that occurs between a few kHz to 1.2 MHz, and peaks in the frequency range 100-400 kHz (Kaiser et al., 1984). It was detected quasi-continuously by Cassini from its arrival at Saturn in 2004 until mission end in 2017 and its properties have been extensively studied. SKR bursts which are global intensifications of SKR as well as extensions of the main SKR band down to lower frequencies, known as Low Frequency Extensions (LFEs), result from internally-driven tail reconnection and from solar wind compressions of the magnetosphere, which also trigger tail reconnection. So far, LFEs had been identified by eye and also using a numerical criterion based on an intensity threshold (Reed et al., 2018). We present a sample of the LFEs detected by Cassini selected using the polygon selector tool by Louis et al. (2022a). LFEs were selected from a diverse range of spacecraft locations across the mission. 984 LFEs were selected in total and were then each categorized into 6 possible classes. The list of selected LFEs can be used for a wide range of applications, the principal one being as a training set for a machine learning approach to classify the remaining LFEs present in the Cassini/RPWS dataset. The list could also be used as a basis for case studies and as context for other activity.
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Dates et versions

insu-04479115 , version 1 (27-02-2024)

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Citer

E. P. O'Dwyer, C. M. Jackman, K. Domijan, L. Lamy, C. K. Louis. Selection of low frequency extensions of Saturn kilometric radiation. Planetary, 0000, à renseigner, Unknown Region. pp.P. Zucca, ⟨10.25546/103103⟩. ⟨insu-04479115⟩
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