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Sunspot Magnetic Fields and Umbral Dots
[chapter]
1971
Solar Magnetic Fields
The fine structure features of the umbral magnetic fields (i.e. large field gradients and changes of polarity in local regions) are considered as evidence of strong non-linear interactions between magnetic and thermal or mechanical forces in the umbra. It is suggested that the umbral dots observed in white light are the optical manifestation of these interactions. A three-dimensional radiative transfer analysis of possible models for these bright features is discussed and this enables one to
doi:10.1007/978-94-010-3117-2_62
fatcat:wond2npt4bfcpcxm3c4traoe5a