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Stable Layers: The Catalyst for Dipolar Dominated Magnetic Fields in Gas Giants

Presentation #302.04 in the session Giant Planet Interior Structure and Dynamics (Oral Presentation)

Published onOct 23, 2023
Stable Layers: The Catalyst for Dipolar Dominated Magnetic Fields in Gas Giants

The two gas giant planets in our solar system, Jupiter and Saturn, both present dipolar dominated magnetic fields, as observed by multiple space missions over the decades. However, numerical dynamo simulations show that models with radially varying electrical conductivity tend to favor multipolar magnetic fields rather than dipolar dominated ones.

Here we use numerical simulations to investigate the effects of stably stratified layers in dynamos with radially varying electrical conductivity. Our goal is to assess whether the presence of a stably stratified layer would encourage a division in dynamics between the deep interior and the shallower layer where electrical conductivity decays exponentially. Furthermore, we evaluate the consequences of the addition of a stably layer on the resulting magnetic field morphology. These studies should provide insights to the dynamics and evolutionary aspects of gas giants’ interiors.

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