| Characterization and Correction of the Scattering Background Produced by Dust on the Objective Lens of the Lijiang 10-cm Coronagraph | |
Sha FY(沙飞扬)1,2,3 ; Liu Y(刘煜)1,2,3; Zhang XF(张雪飞)1; Song TF(宋腾飞)1
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| 发表期刊 | SOLAR PHYSICS
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| 2023-11 | |
| 卷号 | 298期号:11 |
| DOI | 10.1007/s11207-023-02233-3 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Corona Coronagraph Scatter Stray light Dust |
| 摘要 | Scattered light from the objective lens, directly exposed to the intense sunlight, is a dominant source of stray light in internally occulted coronagraphs. The variable stray light, such as the scatter from dust on the objective lens, can produce varying scattering backgrounds in coronal images, significantly impacting image quality and data analysis. Using data acquired by the Lijiang 10-cm Coronagraph, the quantitative relationship between the distribution of dust on the objective lens and the resulting scattering background is analyzed. Two empirical models for the scattering background are derived, and used to correct the raw coronal data. The second model, which depends on three parameters and performs better, shows that the scattering-background distribution varies with angle, weakens with increasing height, and enhances with increasing dust level on the objective lens. Moreover, we find that the dust on the center of the objective lens can contribute more significantly to the scattering background than on the edge. This study not only quantitatively confirms the significant impact of the stray light produced by dust on the objective lens of the coronagraph, but also corrects the coronal data with this stray light for the first time. Correcting for dust-scattered light is crucial for the high-precision calibration of ground-based coronagraph data, enabling a more accurate analysis of coronal structures. Furthermore, our model is envisioned to support the provision of reliable observational data for future routine coronal magnetic-field measurements using ground-based coronagraphs. |
| 资助项目 | National Natural Science Foundation of China[12173086]; National Natural Science Foundation of China[11873090]; National Natural Science Foundation of China[12373063]; National Natural Science Foundation of China[11533009]; National Natural Science Foundation of China[202205AG070009]; Light of West China program of CAS and Yunnan Key Laboratory of the Solar Physics and Space Science[2022YFF0503800]; National Key R&D Program of China; National Science & Technology Infrastructure of China |
| 项目资助者 | National Natural Science Foundation of China[12173086, 11873090, 12373063, 11533009] ; National Natural Science Foundation of China[202205AG070009] ; Light of West China program of CAS and Yunnan Key Laboratory of the Solar Physics and Space Science[2022YFF0503800] ; National Key R&D Program of China ; National Science & Technology Infrastructure of China |
| 语种 | 英语 |
| 学科领域 | 天文学 |
| 文章类型 | Article |
| 出版者 | SPRINGER |
| 出版地 | VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS |
| ISSN | 0038-0938 |
| URL | 查看原文 |
| WOS记录号 | WOS:001107572900001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | MAGNETIC-FIELDS ; TEMPERATURE ; LINE |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/26423 |
| 专题 | 选址与日冕观测组 无名山观测站 |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, China; 2.School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, China; 3.Schoold of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, China |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Sha FY,Liu Y,Zhang XF,et al. Characterization and Correction of the Scattering Background Produced by Dust on the Objective Lens of the Lijiang 10-cm Coronagraph[J]. SOLAR PHYSICS,2023,298(11). |
| APA | 沙飞扬,刘煜,张雪飞,&宋腾飞.(2023).Characterization and Correction of the Scattering Background Produced by Dust on the Objective Lens of the Lijiang 10-cm Coronagraph.SOLAR PHYSICS,298(11). |
| MLA | 沙飞扬,et al."Characterization and Correction of the Scattering Background Produced by Dust on the Objective Lens of the Lijiang 10-cm Coronagraph".SOLAR PHYSICS 298.11(2023). |
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