Solar Convection and Magneto-Convection Simulations

Details Solar Convection and Magneto-Convection Simulations Solar Convection and Magneto-Convection Simulations

2001-12-05

arxiv.org/abs/astro-ph/0112117v1

Nuovo Cim.C025:513-522,2002

Astronomy and Astrophysics

Astrophysics

8 pages, 10 figures

Scientific paper

Magneto-convection simulations with two scenarios have been performed: In one, horizontal magnetic field is advected into the computational domain by fluid entering at the bottom. In the other, an initially uniform vertical magnetic field is imposed on a snapshot of non-magnetic convection and allowed to evolve. In both cases, the field is swept into the intergranular lanes and the boundaries of the underlying mesogranules. The largest field concentrations at the surface reach pressure balance with the surrounding gas. They suppress both horizontal and vertical flows, which reduces the heat transport. They cool, become evacuated and their optical depth unity surface is depressed by several hundred kilometers. Micropores form, typically where a small granule disappears and surrounding flux tubes squeeze into its previous location.

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