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An Automatic Approach for Grouping Sunspots and Calculating Relative Sunspot Number on SDO/HMI Continuum Images

The relative sunspot number is one of the major parameters for the study of long-term solar activity. The automatic calculation of the relative sunspot number is more stable and accurate as compared to manual methods. In this paper, we propose an algorithm that can detect sunspots, and divide them i...

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Main Authors: Cui Zhao, Shangbin Yang, Tingmei Wang, Haiyan Zhao, Shiyuan Liu, Fangyuan He, Zhengkun Hu
Format: Artigo
Language:Inglês
Published: IOP Publishing 2024-01-01
Series:The Astronomical Journal
Subjects:
Sunspot number
Sunspot groups
Solar physics
Online Access:https://doi.org/10.3847/1538-3881/ad11e2
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