Tides induced magnetic field in the solar system

Details Tides induced magnetic field in the solar system Tides induced magnetic field in the solar system

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1080c&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1080

Astronomy and Astrophysics

Astrophysics

Scientific paper

The elliptical instability can take place in planetary cores and stars elliptically deformed by gravitational effects, where it generates large-scale threedimensional flows assumed to be dynamo capable. In this work, we present the first magneto-hydrodynamic (MHD) numerical simulations of such flows, using a finite-element method. We first validate our numerical approach by comparison with kinematic and dynamic dynamos benchmarks of the literature. We then systematically study the magnetic field induced by various modes of the elliptical instability from an imposed external field in a triaxial ellipsoidal geometry, relevant in a geo- and astrophysical context. Finally, we present our first steps towards demonstrating the existence of a tidal dynamo. Results for the solar system are presented and discussed.

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