Dynamical quenching with non-local alpha and downward pumping
Solar and Stellar Astrophysics
2015-01-27 v1
Abstract
In light of new results, the one-dimensional mean-field dynamo model of Brandenburg & Kapyla (2007) with dynamical quenching and a nonlocal Babcock-Leighton alpha effect is re-examined for the solar dynamo. We extend the one-dimensional model to include the effects of turbulent downward pumping (Kitchatinov & Olemskoy 2011), and to combine dynamical quenching with shear. We use both the conventional dynamical quenching model of Kleeorin & Ruzmaikin (1982) and the alternate one of Hubbard & Brandenburg (2011), and confirm that with varying levels of non-locality in the alpha effect, and possibly shear as well, the saturation field strength can be independent of the magnetic Reynolds number.
Keywords
Cite
@article{arxiv.1412.0997,
title = {Dynamical quenching with non-local alpha and downward pumping},
author = {A. Brandenburg and A. Hubbard and P. J. Käpylä},
journal= {arXiv preprint arXiv:1412.0997},
year = {2015}
}
Comments
6 pages, 9 figures, Astron. Nachr., submitted