Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...171..348h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 171, no. 1-2, Jan. 1987, p. 348-367. Research supported by the Space Research
Astronomy and Astrophysics
Astrophysics
19
Astronomical Models, Dynamo Theory, Geomagnetism, Solar Magnetic Field, Turbulent Flow, Kinematic Equations, Stellar Rotation, Stochastic Processes
Scientific paper
In the present paper, a simple mechanical model is analysed that reproduces a few basic features of the average magnetic field in the Sun and the Earth. It provides an intuitive picture of how the α-effect operates in combination with differential rotation. The model serves three purposes: (1) it enhances an intuitive understanding of the behaviour of a magnetic field in turbulent fluids; (2) it shows that kinematic models (and ultimately, non-linear models also) must allow for fluctuations as one is essentially dealing with a stochastic process; (3) it serves as a starting point for a re-analysis of the kinematic dynamo problem.
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