The formation of sunspot penumbral magnetic field and the origin of return flux.

Details The formation of sunspot penumbral magnetic field and the origin of return flux. The formation of sunspot penumbral magnetic field and the origin of return flux.

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997acasn..38....1l&link_type=abstract

Acta Astron. Sin., Vol. 38, No. 1, p. 1 - 8

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Sunspots: Magnetic Fields, Sunspots: Penumbrae, Sunspots: Numerical Simulations

Scientific paper

Some numerical simulations of the process of sunspot formation are made. The main results of computations are as follows: (1) The eddy flow that Meyer used to establish his model of sunspots is naturally formed in the simulation. (2) Only in the upper convective layer near the photosphere, magnetic fields move out quickly and eventually the penumbral magnetic configuration is formed. (3) Above the sunspot surface such extending movement with a speed of 0.2 km/s rolls the field vector only within the layer about 200 km thick below the chromosphere.

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