Millas, D;
Achilleos, N;
Guio, P;
Arridge, CS;
(2021)
The compressibility of the Jovian magnetosphere.
Presented at: Magnetospheres of Outer Planets (MOP) 2021, Liège, Belgium (Virtual conference).
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Abstract
The effect of the solar activity on a magnetosphere, as an external driver, can be studied via the compressibility index; this index is calculated via changes in the magnetopause due to variations in the external pressure and quantifies the overall response of the magnetosphere. The system size, composition and morphology of the magnetospheres of Jupiter and Saturn make them ideal targets for such studies. We report on a numerical study of the compressibility of the Jovian magnetosphere, using an implementation of Caudal’s iterative scheme to create an axisymmetric magnetodisc structure. We create an ensemble of models, treated as virtual observations or “crossings”, using a different system size (parametrized by the magnetopause distance) and hot plasma content (parametrized by the hot plasma index) for each case. We evaluate different methods to obtain the compressibility index and discuss the effects of the system size, compare the results with observations of the Jovian magnetosphere and with similar studies focused on the magnetosphere of Saturn. Furthermore, as a complementary step, we implement Pontius’ algorithm to update the plasma angular velocity using the equatorial magnetodisc structure in a consistent way and examine the major differences with a simple dipole model.
| Type: | Poster |
|---|---|
| Title: | The compressibility of the Jovian magnetosphere |
| Event: | Magnetospheres of Outer Planets (MOP) 2021 |
| Location: | Liège, Belgium (Virtual conference) |
| Dates: | 12 - 16 July 2021 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://lasp.colorado.edu/mop/resources/mop-confer... |
| Language: | English |
| 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 Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10136518 |
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