Observation of spectral lines in the exceptional GRB 221009A

doi:10.1007/s11433-023-2381-0

YNAO OpenIR > 星系类星体研究组

	Observation of spectral lines in the exceptional GRB 221009A
	Zhang, Yan-Qiu 1,2; Xiong, Shao-Lin 1; Mao JR(毛基荣)3,4,5 ; Zhang, Shuang-Nan 1; Xue, Wang-Chen 1,2; Zheng, Chao 1,2; Liu, Jia-Cong 1,2; Zhang, Zhen 1; Wang, Xi-Lu 1; Ge, Ming-Yu 1; Yi, Shu-Xu 1; Song, Li-Ming 1; An, Zheng-Hua 1; Cai, Ce 6; Li, Xin-Qiao 1; Peng, Wen-Xi 1; Tan, Wen-Jun 1,2; Wang, Chen-Wei 1,2; Wen, Xiang-Yang 1; Wang, Yue 1,2; Xiao, Shuo 7; Zhang, Fan 1; Zhang, Peng 1,8; Zheng, Shi-Jie 1
发表期刊	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2024-08
卷号	67 期号:8
DOI	10.1007/s11433-023-2381-0
产权排序	第3完成单位
收录类别	SCI ; EI
关键词	GRB GRB 221009A emission line
摘要	As the brightest gamma-ray burst ever observed, GRB 221009A provided a precious opportunity to explore spectral line features. In this article, we performed a comprehensive spectroscopy analysis of GRB 221009A jointly with GECAM-C and Fermi/GBM data to search for emission and absorption lines. For the first time we investigated the line feature throughout this GRB including the most bright part where many instruments suffered problems, and identified prominent emission lines in multiple time intervals. The central energy of the Gaussian emission line evolves from about 37 to 6 MeV, with a nearly constant ratio (about 10%) between the line width and central energy. Particularly, we find that both the central energy and the energy flux of the emission line evolve with time as a power law decay with power law index of -1 and -2, respectively. We suggest that the observed emission lines most likely origin from the blue-shifted electron positron pair annihilation 511 keV line. We find that a standard high latitude emission scenario cannot fully interpret the observation, thus we propose that the emission line comes from some dense clumps with electron positron pairs traveling together with the jet. In this scenario, we can use the emission line to directly, for the first time, measure the bulk Lorentz factor of the jet (Gamma) and reveal its time evolution (i.e., Gamma similar to t-1) during the prompt emission. Interestingly, we find that the flux of the annihilation line in the co-moving frame keeps constant. These discoveries of the spectral line features shed new and important lights on the physics of GRB and relativistic jet.
资助项目	National Key R&D Program of China[2021YFA0718500]; National Key R&D Program of China[2023YFE0101200]; Strategic Priority Research Program of Chinese Academy of Sciences[XDA15360102]; Strategic Priority Research Program of Chinese Academy of Sciences[XDA15360300]; Strategic Priority Research Program of Chinese Academy of Sciences[XDA15052700]; National Natural Science Foundation of China[12273042]; National Natural Science Foundation of China[61234003]; National Natural Science Foundation of China[61434004]; National Natural Science Foundation of China[61504141]; National Natural Science Foundation of China[11673062]; National Natural Science Foundation of China[12393813]; National Natural Science Foundation of China[2333007]; National Natural Science Foundation of China[12027803]; National Natural Science Foundation of China[12303045]; CAS Interdisciplinary Project[KJZD-EW-L11-04]; Strategic Priority Research Program on Space Science of the Chinese Academy of Sciences[XDA15360000]; Yunnan Revitalization Talent Support Program
项目资助者	National Key R&D Program of China[2021YFA0718500, 2023YFE0101200] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA15360102, XDA15360300, XDA15052700] ; National Natural Science Foundation of China[12273042, 61234003, 61434004, 61504141, 11673062, 12393813, 2333007, 12027803, 12303045] ; CAS Interdisciplinary Project[KJZD-EW-L11-04] ; Strategic Priority Research Program on Space Science of the Chinese Academy of Sciences[XDA15360000] ; Yunnan Revitalization Talent Support Program
语种	英语
学科领域	天文学 ; 星系与宇宙学
文章类型	Article
出版者	SCIENCE PRESS
出版地	16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
ISSN	1674-7348
URL	查看原文
WOS记录号	WOS:001223671000001
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
关键词[WOS]	GAMMA-RAY BURST ; DISCOVERY ; AFTERGLOW ; SUPERNOVA ; EMISSION
EI入藏号	20242116116495
EI主题词	Gamma rays
EI分类号	741.1 Light/Optics - 931.3 Atomic and Molecular Physics - 931.5 Gravitation, Relativity and String Theory - 932.1 High Energy Physics
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/27213
专题	星系类星体研究组中国科学院天体结构与演化重点实验室
作者单位	1.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; 2.University of Chinese Academy of Sciences, Beijing, 100049, China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China; 4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, 100012, China; 5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650216, China; 6.College of Physics and Hebei Key Laboratory of Photophysics Research and Application, Hebei Normal University, Shijiazhuang, 050024, China; 7.Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, 550001, China; 8.College of Electronic and Information Engineering, Tongji University, Shanghai, 201804, China
推荐引用方式 GB/T 7714	Zhang, Yan-Qiu,Xiong, Shao-Lin,Mao JR,et al. Observation of spectral lines in the exceptional GRB 221009A[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2024,67(8).
APA	Zhang, Yan-Qiu.,Xiong, Shao-Lin.,毛基荣.,Zhang, Shuang-Nan.,Xue, Wang-Chen.,...&Zheng, Shi-Jie.(2024).Observation of spectral lines in the exceptional GRB 221009A.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,67(8).
MLA	Zhang, Yan-Qiu,et al."Observation of spectral lines in the exceptional GRB 221009A".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 67.8(2024).

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