Sunspot Structure and Dynamics

Details Sunspot Structure and Dynamics Sunspot Structure and Dynamics

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ssrv..124...13w&link_type=abstract

Space Science Reviews, Volume 124, Issue 1-4, pp. 13-22

Physics

6

Sunspots, Sun: Magnetic Fields

Scientific paper

Sunspots are the most prominent magnetic features on the Sun but it is only within the last few years that the intricate structure of their magnetic fields has been resolved. In the penumbra the fields in bright and dark filaments differ in inclination by 30°. The field in the bright filaments is less inclined to the vertical, while the field in dark filaments becomes almost horizontal at the edge of the spot. Recent models suggest that this interlocking-comb structure is maintained through downward pumping of magnetic flux by small-scale granular convection, and that filamentation originates as a convective instability. Within the bright filaments convection patterns travel radially owing to the inclination of the field. A proper understanding of these processes requires new observations, from space and from the ground, coupled with large-scale numerical modelling.

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