| dc.identifier.citation | Boudouma, A., Zarka, P., Magalhães, F. P., Marques, M. S., Louis, C. K., Echer, E., Lamy, L., Prangé R., Localisation of the main HOM source in the dusk side of the Jovian magnetosphere. In C. K. Louis, C. M. Jackman, G. Fischer, A. H. Sulaiman, P. Zucca, Dublin Institute for Advanced Studies (Eds.), Planetary, Solar and Heliospheric Radio Emissions IX, 2023. https://doi.org/10.25546/103094 | |
| dc.description.abstract | It was suggested in Zarka et al. (2021) that the most intense Jovian hectometric emissions (HOM) originate from the dusk side of the Jovian magnetosphere. These authors showed that the distribution of the main HOM observed inbound by Cassini-RPWS (i.e. on the dayside of Jupiter) is connected to the "vertex-late" arcs (from the limb rotating away from the observer) of the Jovian left-handed (LH) circularly polarized auroral decametric emissions (DAM). This DAM was identified as "C" emissions from the ground-based observations of the Nançay decameter array (NDA) above 16 MHz. They also suggested, based on the outbound Cassini-RPWS observations alone, that LH HOM observed during the outbound leg of Cassini is connected to the "vertex-early" arcs (from the limb rotating toward the observer) of the LH auroral DAM, called D emissions. We perform here a visual analysis of the vertex-early and vertex-late arcs in the Cassini-RPWS polarized dynamic spectra, for the longitude ranges where the LH HOM is connected to the auroral DAM, to determine the relative proportion of C and D emissions observed when Cassini is inbound and outbound. The results show that at these longitudes, Cassini mainly observes C emissions inbound and D emissions outbound. This confirms that the main HOM is connected to the auroral DAM that originates from the southern dusk hemisphere. A detailed statistical study will follow. | |
