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Generation of Magnetic Fields and Electric Currents in the Solar Photosphere

Published online by Cambridge University Press:  08 February 2017

J.C. Henoux  and
B.V. Somov
J.C. Henoux
Affiliation:
⋆ Observatoire de Paris, DASOP, URA326, 92195 Meudon Principal, FRANCE,
B.V. Somov
Affiliation:
⋄ Lebedev Physical Institut, Leninskii Prospect 53, SU-117924 Moscou USSR

Abstract

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Velocities of electrons, ions and neutrals are computed in the three-fluid approximation for an axisymmetrical magnetic field. By prescribing a radial dependence of the velocity of neutrals in agreement with a downflow, the radial dependence of the magnetic field energy density is derived for a given set of values of the magnetic field at the central and external boundaries. Flux-tube cooling by advection of ionization energy is found to be significant. Vortices in the low photosphere could produce significant electric power and DC current intensity along the coronal magnetic lines of forces. The velocities of neutrals, the size and the number of flux-tubes required to power flares in plage regions, are estimated.

Type
IV. Magnetohydrodynamics of the Photosphere
Information
Symposium - International Astronomical Union , Volume 138: Solar Photosphere: Structure, Convection and Magnetic Fields , 1990 , pp. 273 - 277
Copyright
Copyright © Kluwer 1990 

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