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Distribution of magnetic shear angle at the ascending phase of cycle 23

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Abstract

Using the vector magnetograms observed at Huairou Solar Observing Station of National Astronomical Observatories, the magnetic shear angles of solar active regions at the ascending phase of cycle 23 (1996–2000) were calculated. It is found that the statistical distribution of the magnetic shear angles can be fitted well by Gaussian curves. And the dominant sign of the magnetic shear angles is negative (positive) in the northern (southern) hemisphere. It is consistent with the N-S sign asymmetry of force-free field constant α and current helicity.

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Author notes

  1. Zhang Hongqi

    Present address: National Astronomical Observatories, Chinese Academy of Sciences, 100012, Beijing, China

  2. Zhang Bairong & Li Rufeng

    Present address: National Astronomical Observatories, Chinese Academy of Sciences, 650011, Kunming, China

Authors and Affiliations

  1. National Astronomical Observatories, Chinese Academy of Sciences, 100012, Beijing, China

    Dun Jinping

  2. National Astronomical Observatories, Chinese Academy of Sciences, 650011, Kunming, China

    Dun Jinping

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  1. Dun Jinping
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  2. Zhang Hongqi
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  3. Zhang Bairong
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  4. Li Rufeng
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Correspondence to Dun Jinping.

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Dun, J., Zhang, H., Zhang, B. et al. Distribution of magnetic shear angle at the ascending phase of cycle 23. Sci. China Ser. A-Math. 45 (Suppl 1), 12–18 (2002). https://doi.org/10.1007/BF02889678

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  • DOI: https://doi.org/10.1007/BF02889678

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