Regoli, LH;
Roussos, E;
Dialynas, K;
Luhmann, JG;
Sergis, N;
Jia, X;
Roman, D;
... Rae, IJ; + view all
(2018)
Statistical Study of the Energetic Proton Environment at Titan's Orbit From the Cassini Spacecraft.
Journal of Geophysical Research: Space Physics
, 123
(6)
pp. 4820-4834.
10.1029/2018JA025442.
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Abstract
A statistical study of the energetic proton environment at Titan’s orbit as captured by the MIMI/LEMMS and MIMI/CHEMS instruments is performed. The data analyzed cover all the dedicated flybys of Titan by Cassini as well as the orbit crossings that happen far from the moon. The energetic environment is found to be highly variable on timescales comparable to that of the duration of a flyby. Analysis of H+ ion fluxes reveals a weak asymmetry in Saturn local time with the highest fluxes occurring in the premidnight sector of the magnetosphere. A correlation between the energetic ion fluxes and the location of Cassini in the magnetosphere with respect to the center of the current sheet can be observed. Finally, an empirical model of proton spectra for energies above 20 keV is derived based on fits to Kappa distribution functions. This model can be used to better understand the interaction of Titan with the magnetosphere and the energy deposition by energetic particles below the main ionospheric peak.
| Type: | Article |
|---|---|
| Title: | Statistical Study of the Energetic Proton Environment at Titan's Orbit From the Cassini Spacecraft |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2018JA025442 |
| Publisher version: | https://doi.org/10.1029/2018JA025442 |
| Language: | English |
| Additional information: | Copyright © 2018. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Titan, energetic ions, empirical model, Kappa distributions, Cassini, MIMI |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10051545 |
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