Solar filaments as tracers of subsurface processes |
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Authors: | D M Rust |
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Institution: | (1) Applied Physics Laboratory, Johns Hopkins University, 11100 Johns Hopkins Road, 20723 Laurel, MD, USA |
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Abstract: | Solar filaments are discussed in terms of two contrasting paradigms. The standard paradigm is that filaments are formed by
condensation of coronal plasma into magnetic fields that are twisted or dimpled as a consequence of motions of the fields’
sources in the photosphere. According to a new paradigm, filaments form in rising, twisted flux ropes and are a necessary
intermediate stage in the transfer to interplanetary space of dynamo-generated magnetic flux. It is argued that the accumulation
of magnetic helicity in filaments and their coronal surroundings leads to filament eruptions and coronal mass ejections. These
ejections relieve the Sun of the flux generated by the dynamo and make way for the flux of the next cycle. |
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Keywords: | Solar filaments solar dynamo magnetic fields |
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