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Bridging planets and stars using scaling laws in anelastic spherical shell dynamos

Published online by Cambridge University Press:  07 August 2014

R. K. Yadav ,
T. Gastine ,
U. R. Christensen  and
L. Duarte
R. K. Yadav
Affiliation:
Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany Institut für Astrophysik, Georg-August-Universität, 37077 Göttingen, Germany
T. Gastine
Affiliation:
Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
U. R. Christensen
Affiliation:
Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
L. Duarte
Affiliation:
Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany Technische Universität Braunschweig, Germany
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Abstract

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Dynamos operating in the interiors of rapidly rotating planets and low-mass stars might belong to a similar category where rotation plays a vital role. We quantify this similarity using scaling laws. We analyse direct numerical simulations of Boussinesq and anelastic spherical shell dynamos. These dynamos represent simplified models which span from Earth-like planets to rapidly rotating low-mass stars. We find that magnetic field and velocity in these dynamos are related to the available buoyancy power via a simple power law which holds over wide variety of control parameters.

Keywords

stars: low-massbrown dwarfsstars: magnetic fieldconvectionmethods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 174 - 175
Copyright
Copyright © International Astronomical Union 2014 

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