A perturbation method for evaluating the magnetic field induced from an arbitrary, asymmetric ocean world analytically.

ABSTRACT: Magnetic investigations of icy moons have provided some of the most compelling evidence available confirming the presence of subsurface, liquid water oceans. In the exploration of ocean moons, especially Europa, there is a need for mathematical models capable of predicting the magnetic fields induced under a variety of conditions, including in the case of asymmetric oceans. Existing models are limited to either spherical symmetry or assume an ocean with infinite conductivity. In this work, we use a perturbation method to derive a semi-analytic result capable of determining the induced magnetic moments for an arbitrary layered body, provided each layer is nearly spherical. Crucially, we find that degree-2 tidal deformation results in changes to the induced dipole moments. We demonstrate app

SUBMITTER: Styczinski MJ 

PROVIDER: S-EPMC8819682 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature