Rossby and Magnetic Prandtl Number Scaling of Stellar Dynamos

Author
Abstract
Rotational scaling relationships are examined for the degree of equipartition between magnetic and kinetic energies in stellar convection zones. These scaling relationships are approached from two paradigms, with first a glance at scaling relationship built on an energy-balance argument and second a look at a force-based scaling. The latter implies a transition between a nearly constant inertial scaling when in the asymptotic limit of minimal diffusion and magnetostrophy, whereas the former implies a weaker scaling with convective Rossby number. Both scaling relationships are then compared to a suite of 3D convective dynamo simulations with a wide variety of domain geometries, stratifications, and range of convective Rossby numbers.
Year of Publication
2019
Journal
The Astrophysical Journal
Volume
876
Number of Pages
83
Date Published
2019-05
URL
https://iopscience.iop.org/article/10.3847/1538-4357/ab14ea
DOI
10.3847/1538-4357/ab14ea
JILA PI
Journal Article