The relationship of sunspot magnetic fields to umbral sizes in return flux theory

Details The relationship of sunspot magnetic fields to umbral sizes in return flux theory The relationship of sunspot magnetic fields to umbral sizes in return flux theory

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..468o&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 1, 1989, p. 468-474.

Physics

18

Penumbras, Solar Magnetic Field, Sunspots, Umbras, Magnetic Field Configurations, Magnetic Flux, Magnetohydrodynamics, Solar Physics

Scientific paper

The relationship between the relative size of a sunspot umbra and the relative magnitude of the magnetic field at the outer edge of the penumbra is studied. It is found that the sunspot magnetic topology is composed of two magnetic regimes, one consisting of open field lines emerging from the core and extending to infinity, and the second consisting of lines returning to the photosphere. The relative quantity of the return magnetic flux is closely associated with the size of the umbra relative to the penumbra.

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