Comparative Earth and Jovian radiation belts

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Since the 90s ONERA has developped a physical model of the Earth radiation belts, called Salammbo 3D. More recently this model has been extended to the Jovian environment. These models have been successfully compared to measurements and, for the Jovian case, to radioastronomy images. From lessons learned from these modeling activities we plan here to review the main characteristics of radiation belts in the vicinity of magnetised body illustrated with Earth and Jupiter environment. We will show how the same fundamental physical processes (radial diffusion, interactions with exosphere and ionosphere-plasmasphere) lead to similarities between the two sets of belts. Nevertheless we will emphasize the specificity of each planet. In the Earth case, the lower magnetic field intensity leads to strong dynamics while in the Jovian case, there is a strong influence of dust particles and moons.

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