Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-29T20:58:43.743Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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 

References

Akasofu, S.I. (1984a) ‘Vortical distribution of Sunspots’, Planet. Space Sci., Vol.33, No.3, 275 Google Scholar
Akasofu, S.I. (1984b) ‘Sunspot pair formation by the photospheric dynamo process’ Planet.Space Sci., Vol.32, No.10, 1257 Google Scholar
Akasofu, S.I. (1984c) ‘An essay on Sunspots and Solar Flares’, Planet. Space Sci., Vol.32, No.11, 1469 Google Scholar
Ambroz, P. (1987) ‘The global horizontal circulation on the Sun’, Bull. Astron.Inst. Czechosl., 38, 110 Google Scholar
Bumba, V. (1987a) ‘Magnetic Fields of the Sun and Stars’, 10th European Regional Astronomy Meeting of the IAU, The Sun, Vol.1,3 (1987) Google Scholar
Bumba, V. (1987b) ‘Does the solar dynamo act in Sunspot Groups’, 10th European Regional Astronomy Meeting of the IAU, The Sun, Vol.1, 59 Google Scholar
Hénoux, J.C. and Somov, B.V. (1987) ‘Generation and structure of the electric currents in a flaring activity complex’, Astron. & Astrophys., 185, 306 Google Scholar
Hénoux, J.C. and Somov, B.V. (1988) ‘Electrodynamic conversion of energy: Magnetic field amplification in the solar photosphere’ Adv. in Space Res., in press Google Scholar
Hénoux, J.C. and Somov, B.V. (1989), submitted to Astron. & Astrophys. Google Scholar
Kubát, J. and Karlick$yA, M. (1986) ‘Electrical conductivity in the solar photosphere and chromosphere’, Bull. Astron. Inst. Czechosl., 37, 155 Google Scholar
Martres, M.J., Soru-Escaut, I., Rayrole, J. (1973) ‘Relationship between some Photospheric Motions and the Evolution of Active Centers’, Solar Phys., 32, 365 Google Scholar
Schatten, K.H. and Mayr, H.G. (1985) ‘On the maintenance of Sunspots: An ion hurricane mechanism’, Ap.J., 299, 1051 Google Scholar
Spicer, D.S. (1982) ‘Magnetic energy storage and conversion in the solar atmosphere’, Space Science Reviews, 31, 435 Google Scholar