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Generation of large-scale magnetic fields in young solar-type stars

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Abstract

Differential-rotation and dynamo models are computed for a young, solar-mass star at the initial stage of the formation of its radiative core. It is argued that the global magnetic fields in the radiative zones of the contemporary Sun and similar stars are due to the action of a hydromagnetic dynamo at early evolutionary stages. Our computations suggest that this field should be nonaxisymmetric. Physical reasons for departures from axial symmetry are discussed in detail. It is suggested that nonaxisymmetric relic fields are responsible for the phenomenon of active longitudes.

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Authors and Affiliations

  1. Institute of Solar-Terrestrial Physics, Siberian Division, Russian Academy of Sciences, P.O. Box 4026, Irkutsk, 664033, Russia

    L. L. Kitchatinov

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__________

Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 78, No. 10, 2001, pp. 934–941.

Original Russian Text Copyright © 2001 by Kitchatinov.

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Kitchatinov, L.L. Generation of large-scale magnetic fields in young solar-type stars. Astron. Rep. 45, 816–823 (2001). https://doi.org/10.1134/1.1408982

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  • DOI: https://doi.org/10.1134/1.1408982

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