National Astronomical Observatories, Chinese Academy of Sciences
Natural Sciences (Astrophysics and Astrononmy)
In this talk, we would like to analyze the configuration and evolution of magnetic fields and the corresponding relationship with the magnetic non-potentiality and helicity of active regions by means of observations of solar vector magnetograms. We present the magnetic helicity distribution and the change with the solar cycles based on the statistical analysis of the magnetic field in solar active regions. We also discuss some questions on the solar vector magnetic field and helicity from the solar observations.
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