Generation of coronal magnetic fields by random surface motions. I - Mean square twist and current density

Details Generation of coronal magnetic fields by random surface motions. I - Mean square twist and current density Generation of coronal magnetic fields by random surface motions. I - Mean square twist and current density

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...252..369b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 252, no. 1, Dec. 1991, p. 369-376.

Astronomy and Astrophysics

Astrophysics

40

Current Density, Magnetohydrodynamic Flow, Mean Square Values, Random Processes, Solar Corona, Solar Magnetic Field, Energy Dissipation, Magnetic Flux, Photosphere, Stellar Magnetic Fields

Scientific paper

The Sturrock-Uchida model is reexamined, and expressions are derived for the mean-square twist in terms of the statistical properties of the photospheric flow. An evaluation of these expressions for typical photospheric parameters leads to a lower rate of energy input than that obtained in the original model. The heating rate due to mean square translations of the footpoints of a flux tube is also examined.

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