Variation in the intensity ratio at each wavelength point of the Si IV 1394/1403 Å lines Spectral diagnostics of a bifurcated eruption
文献类型：期刊论文
| 作者 | Zhou YA(周羿安)1,2 ; Yan XL(闫晓理)1,2; Xue ZK(薛志科)1,2; Yang LH(杨丽恒)1,2; Wang JC(王金成)1,2; Xu Z(徐喆)1,2
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2024-12-13 |
| 卷号 | 692 |
| 关键词 | line: profiles opacity Sun: activity Sun: transition region Sun: UV radiation |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202449488 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Aims. This study aims to investigate the deviation of the intensity ratio of the Si IV 1394 & Aring; and 1403 & Aring; emission lines from the expected value of 2 in the optically thin regime, as has been observed in many recent studies. Methods. We analyzed the integrated intensity ratio (R) and the wavelength-dependent ratio (r(Delta lambda)) in a small bifurcated eruption event observed by the Interface Region Imaging Spectrograph (IRIS). Results. Despite the relatively complex line profiles, the intensity ratio, R, of Si IV lines mostly remains greater than 2 in the loops. The ratio r(Delta lambda) varies in the line core and wings, changing distinctly from 2.0 to 3.3 along the wavelength. At certain positions, the Si IV 1394 & Aring; and 1403 & Aring; lines exhibit different Doppler velocities. Conclusions. When diagnosing the spectra of small active region events, not only the impact of opacity but also the influence of resonance scattering should be considered. We propose that the ratio r(Delta lambda) can serve as an indicator of the resonance scattering and opacity effect of the Si IV line. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| WOS关键词 | TRANSITION REGION ; EXPLOSIVE EVENTS ; SPECTROSCOPIC OBSERVATIONS ; MAGNETIC RECONNECTION ; RESONANT SCATTERING ; IRIS OBSERVATIONS ; ATOMIC DATABASE ; ELLERMAN BOMBS ; SOLAR ; EMISSION |
| 资助项目 | Yunling Scholar Project of Yunnan province; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0560000]; National Science Foundation of China( NSFC)[12325303]; National Science Foundation of China( NSFC)[11973084]; National Science Foundation of China( NSFC)[11803085]; National Science Foundation of China( NSFC)[12003064]; National Science Foundation of China( NSFC)[U1831210]; National Science Foundation of China( NSFC)[11803002]; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]; Yunnan Provincial Science and Technology Department[202305AH340002] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001441922300005 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | Yunling Scholar Project of Yunnan province ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0560000] ; National Science Foundation of China( NSFC)[12325303, 11973084, 11803085, 12003064, U1831210, 11803002] ; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009] ; Yunnan Provincial Science and Technology Department[202305AH340002] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28219]  |
| 专题 | 云南天文台_抚仙湖太阳观测站 |
| 作者单位 | 1.Yunnan Key Laboratory of the Solar physics and Space Science, Kunming 650216, PR China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming Yunnan 650216, PR China; |
| 推荐引用方式 GB/T 7714 | Zhou YA,Yan XL,Xue ZK,et al. Variation in the intensity ratio at each wavelength point of the Si IV 1394/1403 Å lines Spectral diagnostics of a bifurcated eruption[J]. ASTRONOMY & ASTROPHYSICS,2024,692. |
| APA | 周羿安,闫晓理,薛志科,杨丽恒,王金成,&徐喆.(2024).Variation in the intensity ratio at each wavelength point of the Si IV 1394/1403 Å lines Spectral diagnostics of a bifurcated eruption.ASTRONOMY & ASTROPHYSICS,692. |
| MLA | 周羿安,et al."Variation in the intensity ratio at each wavelength point of the Si IV 1394/1403 Å lines Spectral diagnostics of a bifurcated eruption".ASTRONOMY & ASTROPHYSICS 692(2024). |
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来源：云南天文台
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