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From polarimetry to helicity: Studies of solar magnetic fields at the Huairou Solar Observing Station

  • HongQi ZhangEmail author
Review

Abstract

In this paper, we briefly introduce the basic questions in the measurements of solar magnetic fields and the possible error sources due to the approximation of the theory of radiation transfer of spectral lines in the solar atmosphere. We introduce some basic research progress in magnetic field measurement at Huairou Solar Observing Station of National Astronomical Observatories, Chinese Academy of Sciences, especially concerning the non-potentiality in solar active regions, such as the magnetic shear, current and helicity. We also discuss some basic questions for the measurements of the magnetic fields and corresponding challenges for the future studies.

Keywords

solar spectrum polarization-stokes parameters magnetic fields-current and helicity 

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© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of Solar Activity, National Astronomical ObservatoriesChinese Academy of SciencesBeijingChina

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