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Forward Modeling of Dust-induced Stray Light in Ground-based Coronagraphs: A Dual-path Monitoring Approach for High-precision Inner Corona Observations

文献类型：期刊论文

作者Liu XD(刘先德)1,2; Zhang XF(张雪飞)1; Liu, Yu3; Song TF(宋腾飞)1; Zhao MY(赵明宇)1; Sun, Mingzhe4; Sha, Feiyang3; Fang, Jun2
刊名ASTROPHYSICAL JOURNAL
出版日期2026-05-10
卷号1002期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/ae60fa
产权排序第1完成单位
文献子类Article
英文摘要High-precision ground-based observations of the inner corona (1.05-2.0 R circle dot) are fundamentally constrained by instrumental stray light, particularly the additive background from dynamic dust accumulation on the objective lens. To address this issue, we propose a correction method for the Spectral Imaging Coronagraph (SICG) based on dual-path real-time monitoring and forward physical modeling. By simultaneously imaging the objective lens surface, we obtain deterministic prior information on dust distribution. We construct a physical point-spread function using optical defocus parameters and reconstruct the nonuniform scattering background via convolution. Model parameters are retrieved through data-driven inversion constrained by polar coronal holes. The method demonstrates excellent robustness under varying contamination conditions. After correction, the rms noise in the polar background is reduced by approximately 67% on average, and the signal-to-background ratio improves by a factor of up to 3.7 under heavy contamination conditions. Comparisons with space-based Solar Dynamics Observatory/Atmospheric Imaging Assembly observations indicate that the corrected images recover the morphological structures of streamers with high fidelity. Further radial intensity analysis reveals that the correction process successfully restores the hydrostatic exponential decay characteristic of inner coronal radiation. The fitted decay coefficient corresponds to a plasma temperature of approximately 2.0 MK, consistent with the characteristic formation temperature of the Fe xiv 530.3 nm line. These results demonstrate that the method effectively eliminates the dominant systematic bias in ground-based observations, providing a reliable data foundation for high-precision coronal thermodynamic and dynamic research with the SICG.
学科主题天文学 ; 太阳与太阳系 ; 天体物理学 ; 实测天体物理学
URL标识查看原文
出版地No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND
WOS关键词MAGNETIC-FIELD ; TEMPERATURE ; DENSITY
资助项目Yunnan Fundamental Research Project[202501AS070004]; Yunnan Fundamental Research Project[202401AT070140]; MOST divided by National Natural Science Foundation of China (NSFC)[12173086]; MOST divided by National Natural Science Foundation of China (NSFC)[12373063]; MOST divided by National Natural Science Foundation of China (NSFC)[11533009]; MOST divided by National Natural Science Foundation of China (NSFC)[12163004]; MOST divided by National Natural Science Foundation of China (NSFC)[12473089]; MOST divided by National Natural Science Foundation of China (NSFC)[42274227]; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001761153900001
出版者IOP Publishing Ltd
资助机构Yunnan Fundamental Research Project[202501AS070004, 202401AT070140] ; MOST divided by National Natural Science Foundation of China (NSFC)[12173086, 12373063, 11533009, 12163004, 12473089, 42274227] ; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/29186]  
专题无名山观测站
通讯作者Zhang XF(张雪飞)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China; zhangxuefei@ynao.ac.cn;
2.School of Physics and Astronomy, Yunnan University, Kunming 650091, People’s Republic of China; fangjun@ynu.edu.cn;
3.School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 611756, People’s Republic of China;
4.Shandong Key Laboratory of Space Environment and Exploration Technology, Institute of Space Sciences, School of Space Science and Technology, Shandong University, Weihai 264209, Shandong, People’s Republic of China
推荐引用方式
GB/T 7714		 Liu XD,Zhang XF,Liu, Yu,et al. Forward Modeling of Dust-induced Stray Light in Ground-based Coronagraphs: A Dual-path Monitoring Approach for High-precision Inner Corona Observations[J]. ASTROPHYSICAL JOURNAL,2026,1002(2).
APA 刘先德.,张雪飞.,Liu, Yu.,宋腾飞.,赵明宇.,...&Fang, Jun.(2026).Forward Modeling of Dust-induced Stray Light in Ground-based Coronagraphs: A Dual-path Monitoring Approach for High-precision Inner Corona Observations.ASTROPHYSICAL JOURNAL,1002(2).
MLA 刘先德,et al."Forward Modeling of Dust-induced Stray Light in Ground-based Coronagraphs: A Dual-path Monitoring Approach for High-precision Inner Corona Observations".ASTROPHYSICAL JOURNAL 1002.2(2026).

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