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Investigation into the Relation between Active Regions’ Compliance with Empirical Laws and Flare Productivity

  • Authors: Jinhui Pan, Rui Liu, Jiangtao Su, Jie Jiang

Jinhui Pan et al 2026 The Astrophysical Journal Supplement Series 285 .

  • Provider: AAS Journals

Caption: Figure 5.

Frequency distribution of ARs with respect to centroid distance between opposite polarities. The left, middle, and right columns show the compliance state with Hale’s law, Joy’s law, and the HHR, respectively, for the full dataset (top row), SC24 (middle row), and SC25 (bottom row). The red (blue) bars, as scaled by the left y-axis, represent the number of ARs that obey (violate) the empirical laws; black dots, as scaled by the right y-axis, show the compliance rate in each individual distance bin. The Pearson correlation coefficient (rP) and the Spearman rank correlation coefficient (rS) between compliance rate and centroid distance are annotated in each panel. Error bars show the range of compliance rates obtained by varying the magnetic field threshold, the AR patch size, and the cycle boundary, as described in Section 2.

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