A note on the evolution of magnetic helicity in active regions |
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Authors: | Wang Jingxiu |
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Institution: | (1) Beijing Astronomical Observatory, Chinese Academy of Sciences, 100080 Beijing, China |
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Abstract: | The evolution of magnetic helicity in a rapidly growing active region is governed mainly by the advection of magnetic fields into the photosphere. Dissipation at the photosphere makes only a minor contribution to helicity evolution. Current helicity dissipation in the three-dimensional domain around the active region can be ignored. |
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