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	Variation in the intensity ratio at each wavelength point of the Si IV 1394/1403 Å lines Spectral diagnostics of a bifurcated eruption
	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
发表期刊	ASTRONOMY & ASTROPHYSICS
	2024-12-13
卷号	692
DOI	10.1051/0004-6361/202449488
产权排序	第1完成单位
收录类别	SCI ; EI
关键词	line: profiles opacity Sun: activity Sun: transition region Sun: UV radiation
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.
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]
项目资助者	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]
语种	英语
学科领域	天文学 ; 太阳与太阳系
文章类型	Article
出版者	EDP SCIENCES S A
出版地	17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN	0004-6361
URL	查看原文
WOS记录号	WOS:001441922300005
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	TRANSITION REGION ; EXPLOSIVE EVENTS ; SPECTROSCOPIC OBSERVATIONS ; MAGNETIC RECONNECTION ; RESONANT SCATTERING ; IRIS OBSERVATIONS ; ATOMIC DATABASE ; ELLERMAN BOMBS ; SOLAR ; EMISSION
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/114a53/28219
专题	抚仙湖太阳观测和研究基地
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming Yunnan 650216, PR China; 2.Yunnan Key Laboratory of the Solar physics and Space Science, Kunming 650216, PR 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	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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