A possible explanation of the fine structure of magnetic fields on the sun

Details A possible explanation of the fine structure of magnetic fields on the sun A possible explanation of the fine structure of magnetic fields on the sun

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979azh....56.1297v&link_type=abstract

Astronomicheskii Zhurnal, vol. 56, Nov.-Dec. 1979, p. 1297-1302. In Russian.

Astronomy and Astrophysics

Astronomy

2

Fine Structure, Magnetic Pumping, Photosphere, Solar Magnetic Field, Atmospheric Models, Atmospheric Turbulence, Hartmann Flow, Magnetohydrodynamic Flow, Solar Atmosphere, Solar Granulation, Stochastic Processes

Scientific paper

The paper examines a possibility of pumping of the photospheric magnetic field by hydrodynamic motions up to large values of the magnetic force, such that the magnetic energy density exceeds the kinetic density. The possibility of such pumping is illustrated by a simple example of Hartmann flow, and a stochastic model of pumping is developed for the case when the magnetic field is amplified by granulation motions. The granules have short lifetimes, and the model agrees with the observations. Finally, an estimate is given of saturation effects in the case when further amplification of the field is not possible.

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