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| Paper: |
Global-scale Magnetism (and Cycles) in Dynamo Simulations of
Stellar Convection Zones |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
277 |
| Authors: |
Brown, B. P.; Browning, M. K.; Brun, A. S.; Miesch, M. S.; Toomre, J. |
| Abstract: |
Young solar-type stars rotate rapidly and are very magnetically
active. The magnetic fields at their surfaces likely originate in
their convective envelopes where convection and rotation can drive
strong dynamo action. Here we explore simulations of global-scale
stellar convection in rapidly rotating suns using the 3-D MHD
anelastic spherical harmonic (ASH) code. The magnetic fields built
in these dynamos are organized on global-scales into wreath-like
structures that span the convection zone. We explore one case
rotates five times faster than the Sun in detail. This dynamo
simulation, called case D5, has repeated quasi-cyclic reversals of
global-scale polarity. We compare this case D5 to the broader
family of simulations we have been able to explore and discuss how
future simulations and observations can advance our understanding of
stellar dynamos and magnetism. |
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