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Simple Scaling Relationships for Stellar Dynamos

Authors: Augustson, Kyle; Mathis, Stéphane; Brun, Allan Sacha;

Simple Scaling Relationships for Stellar Dynamos

Abstract

This paper provides a brief overview of dynamo scaling relationships for the degree of equipartition between magnetic and kinetic energies. Three basic approaches are adopted to explore these scaling relationships, with a first look at two simple models: one assuming magnetostrophy and another that includes the effects of inertia. Next, a third scaling relationship is derived that utilizes the assumptions that the dynamo possesses two integral spatial scales and that it is driven by the balance of buoyancy work and ohmic dissipation as studied in Davidson 2013. The results of which are then compared to a suite of convective dynamo simulations that possess a fully convective domain with a weak density stratification and that captured the behavior of the resulting dynamo for a range of convective Rossby numbers (Augustson et al. 2016).

7 pages, 3 figures, in the Proceedings of the 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun

Keywords

Astrophysics - Solar and Stellar Astrophysics, Scaling Relationships, FOS: Physical sciences, Stellar Magnetism, Solar and Stellar Astrophysics (astro-ph.SR)

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This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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