Understanding the Lyα Emission Observed by the Solar Disk Imager Aboard the Advanced Space-Based Solar Observatory
文献类型：期刊论文
| 作者 | Li, Yiliang1,2; Zhang, Ping1; Tian, Zhengyuan1,2; Feng, Li1,2; Shi, Guanglu1,2; Xue, Jianchao1; Li, Ying1,2; Tian, Jun1,2; Ji KF(季凯帆)3 ; Ying, Beili1
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| 刊名 | SOLAR PHYSICS
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| 出版日期 | 2025-06 |
| 卷号 | 300期号:6 |
| 关键词 | Flares, spectrum Spectral line, intensity and diagnostics Prominences Active regions, structure Center-limb observations |
| ISSN号 | 0038-0938 |
| DOI | 10.1007/s11207-025-02491-3 |
| 产权排序 | 第3完成单位 |
| 文献子类 | Article |
| 英文摘要 | The H I Lyman-alpha (Ly alpha) emission, with a wavelength of 1216 angstrom, is the brightest solar ultraviolet (UV) line. However, comprehensive observations of the Ly alpha emission line across the full solar disk remain limited. As part of the ASO-S mission, the Solar Disk Imager (SDI) has successfully captured full-disk images in the Ly alpha band. Gaussian fitting of SDI's spectral response function (SRF) yields a full width at half maximum (FWHM) of approximately 85 A, which is significantly broader than the distance of Si III line at 1206 A and the Ly alpha line. Thus, the emission contribution of Si III to the SDI Ly alpha passband needs to be considered. For flares, in practice, we calculated the integrated intensity ratio I (Si III)/I (Ly alpha) by analyzing spectral observations from the SOLSTICE instrument. It yields values between 1.7% and 14.6%. Empirically, the ratio is proportional to the SXR flux. Further analysis of spectral data from the SUMER instrument reveals that the ratio I (Si III)/ I (Ly alpha) is approximately 0.5% for prominences, 0.7% - 0.9% for the inner disk, and 1.4% - 1.9% close to the limb. These findings suggest that I (Si III)/I (Ly alpha) is minimal for prominences and the inner disk, and the varying ratios across regions align with the center-to-limb variation of the Si III and Ly alpha lines. Additionally, we compared Ly alpha image intensity with 304 A, 1600 A, and 1700 A observations from AIA, as well as Ha from CHASE, in multiple regions (a prominence region, two active regions, and a quiet region). A relatively higher correlation of about 85% is found between Ly alpha and 304 A in active regions, whereas in the quiet region and prominence, their correlation coefficients are about 55%. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS |
| WOS关键词 | LYMAN-ALPHA ; LINE ; CHROMOSPHERE ; PROFILE ; QUIET ; SUMER |
| 资助项目 | National Key Research and Development Program of China; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences; Laboratory for Atmospheric and Space Physics (LASP), USA; China National Space Administration |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001501513300002 |
| 出版者 | SPRINGER |
| 资助机构 | National Key Research and Development Program of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Laboratory for Atmospheric and Space Physics (LASP), USA ; China National Space Administration |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28334]  |
| 专题 | 天文技术实验室 |
| 通讯作者 | Feng, Li |
| 作者单位 | 1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210023, China; 2.School of Astronomy and Space Science, University of Science and Technology of China, Hefei, 230026, China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China; 4.University of Chinese Academy of Sciences, Nanjing, 211135, China |
| 推荐引用方式 GB/T 7714 | Li, Yiliang,Zhang, Ping,Tian, Zhengyuan,et al. Understanding the Lyα Emission Observed by the Solar Disk Imager Aboard the Advanced Space-Based Solar Observatory[J]. SOLAR PHYSICS,2025,300(6). |
| APA | Li, Yiliang.,Zhang, Ping.,Tian, Zhengyuan.,Feng, Li.,Shi, Guanglu.,...&Gan, Weiqun.(2025).Understanding the Lyα Emission Observed by the Solar Disk Imager Aboard the Advanced Space-Based Solar Observatory.SOLAR PHYSICS,300(6). |
| MLA | Li, Yiliang,et al."Understanding the Lyα Emission Observed by the Solar Disk Imager Aboard the Advanced Space-Based Solar Observatory".SOLAR PHYSICS 300.6(2025). |
入库方式： OAI收割
来源：云南天文台
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