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Toward a dynamo model for the solar tachocline

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  • Lillo, Rolando
  • Mininni, Pablo D.
  • Gómez, Daniel O.

Abstract

The generation of magnetic field on the Sun is caused by a dynamo mechanism, and is related with the differential rotation of the solar interior. Helioseismologic observations show that strong velocity gradients concentrate in a thin layer located at the base of the convective region, known as the tachocline. This remarkable observational finding lends support to a theoretical model for the solar dynamo, based on a magnetohydrodynamic extension of the so called shallow water approximation. We developed a numerical code to integrate the dynamic equations. Our analysis shows an initial stage during which the magnetic energy grows exponentially fast. In a subsequent stage we find that magnetic energy keeps growing until it reaches equipartition with the mechanical energy of the flow.

Suggested Citation

  • Lillo, Rolando & Mininni, Pablo D. & Gómez, Daniel O., 2005. "Toward a dynamo model for the solar tachocline," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 349(3), pages 667-674.
    • Handle: RePEc:eee:phsmap:v:349:y:2005:i:3:p:667-674
    DOI: 10.1016/j.physa.2004.10.037
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    1. C. C. Patterson, 1972. "Silver Stocks and Losses in Ancient and Medieval Times," Economic History Review, Economic History Society, vol. 25(2), pages 205-233, May.
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