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Convective Pumping of Magnetic Fields: On the Flux Storage Problem for Solar-like Dynamos

  • S. B. F. Dorch (a1) and Å. Nordlund (a2)

Abstract

We present results from three-dimensional numerical simulations of the interaction of stratified over-turning solar-like convection with a large-scale magnetic field: By the very nature of stellar convection, even a strong magnetic field may be held down at the bottom of the convection zone, rendering the flux storage problem obsolete. This effect may also explain the observations of some magnetically active but fully convective late type dwarf stars.

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References

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Dorch, S.B.F. 1998, , Copenhagen University, 59.
Dorch, S.B.F., & Nordlund, A. 2000, A&A, in press.
Galsgaard, K., & Nordlund, A. 1997, Journ. Geoph. Res., 102, 219.
Nordlund, Å., Galsgaard, K., & Stein, R.F. 1994, in NATO ASI Series 433, Solar.
Surface Magnetic Fields, ed. Rutten, R.J., 471 Schrijver, C.J., & Zwaan, C. 2000, Solar and Stellar Magnetic Activity, Cambridge, 299.
Tobias, S., Brummel, N., Clune, T., & Toomre, J. 1998, ApJ, 502, L177.

Convective Pumping of Magnetic Fields: On the Flux Storage Problem for Solar-like Dynamos

  • S. B. F. Dorch (a1) and Å. Nordlund (a2)

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