Solar convection as the producer of magnetic bipoles

Details Solar convection as the producer of magnetic bipoles Solar convection as the producer of magnetic bipoles

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..819g&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

2

Magnetoconvection, Magnetic Bipoles, Sunspot Formation

Scientific paper

A mechanism for the in situ formation of bipolar magnetic configurations, alternative to the well-known rising-tube mechanism, is considered. Cellular magnetoconvection is simulated numerically. The initial magnetic field is assumed to be fairly weak and directed horizontally. A pattern of small-amplitude hexagonal cells is specified initially. A hexagonal convection cell can substantially amplify the magnetic field and impart bipolar configurations to it. Depending on the parameters, the amplified field may form either a simple pair of magnetic islands, opposite in polarity, or a more complex superposition of bipoles. In particular, very compact magnetic elements of strong field can form. The resulting pattern of magnetic-field evolution is in better agreement with observations than the rising-tube model.

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