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On the External Inverse Compton Scattering off the Prompt Emission in GRB 221009A

文献类型：期刊论文

作者Dai, Cui-Yuan1,2; Zheng, Jian-He1,2; Zhao XH(赵晓红)3,4,5; Liu, Ruo-Yu1,2; Wang, Xiang-Yu1,2
刊名ASTROPHYSICAL JOURNAL
出版日期2025-05-09
卷号984期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/adc442
产权排序第3完成单位
文献子类Article
英文摘要The temporal evolution of the TeV emission of GRB 221009A displays a smooth transition from an initial rapid rise to a slower rise and eventually a decay phase. The smooth light curve suggests an afterglow origin of the TeV emission. The temporal overlap between the prompt keV-MeV emission and the early TeV afterglow indicates that external inverse Compton (EIC) scattering between the prompt keV-MeV photons and the afterglow electrons is inevitable. Since the energy density of the prompt emission is much higher than that of the afterglow during the early phase, the EIC process dominates the cooling of afterglow electrons. The EIC scattering rate is influenced by the anisotropy of the seed photon field, which depends on the radius of the internal dissipation (Rdis), where the prompt emission is produced, and that of the external shock (Rext), where the afterglow emission is produced. We investigate the EIC process for different values of Rdis/Rext and find that the EIC scattering rate can differ by a factor of similar to 2 accordingly. For GRB 221009A, the EIC emission dominates during the early rising phase of the TeV afterglow. It then transitions to a phase dominated by the synchrotron self-Compton emission as the intensity of the prompt emission decreases. Additionally, we investigate the effect of gamma gamma absorption in the TeV afterglow by prompt MeV photons and find it insufficient to explain the early rapid rise in the TeV afterglow.
学科主题天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词GAMMA-RAY BURST ; HIGH-ENERGY AFTERGLOW ; RELATIVISTIC ELECTRONS ; INTERNAL SHOCKS ; TEV EMISSION ; BRIGHT GRB ; MODEL ; SYNCHROTRON ; WIND ; SPECTRA
资助项目MOST divided by National Natural Science Foundation of China (NSFC) https://doi.org/10.13039/501100001809[12393852]; MOST divided by National Natural Science Foundation of China (NSFC) https://doi.org/10.13039/501100001809[12333006]; MOST divided by National Natural Science Foundation of China (NSFC) https://doi.org/10.13039/501100001809[12121003]; MOST divided by National Natural Science Foundation of China (NSFC) https://doi.org/10.13039/501100001809[12393811]; National Natural Science Foundation of China
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001485465200001
出版者IOP Publishing Ltd
资助机构MOST divided by National Natural Science Foundation of China (NSFC) https://doi.org/10.13039/501100001809[12393852, 12333006, 12121003, 12393811] ; National Natural Science Foundation of China
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28304]  
专题星系类星体研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, People's Republic of China; ryliu@nju.edu.cn, xywang@nju.edu.cn;
2.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210023, People's Republic of China;
3.Yunnan Observatories, Chinese Academy of Sciences Kunming, 650011, People's Republic of China;
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Science Kunming, 650011, People's Republic of China;
5.Center for Astronomical Mega-Science, Chinese Academy of Science, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
推荐引用方式
GB/T 7714		 Dai, Cui-Yuan,Zheng, Jian-He,Zhao XH,et al. On the External Inverse Compton Scattering off the Prompt Emission in GRB 221009A[J]. ASTROPHYSICAL JOURNAL,2025,984(2).
APA Dai, Cui-Yuan,Zheng, Jian-He,赵晓红,Liu, Ruo-Yu,&Wang, Xiang-Yu.(2025).On the External Inverse Compton Scattering off the Prompt Emission in GRB 221009A.ASTROPHYSICAL JOURNAL,984(2).
MLA Dai, Cui-Yuan,et al."On the External Inverse Compton Scattering off the Prompt Emission in GRB 221009A".ASTROPHYSICAL JOURNAL 984.2(2025).

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来源：云南天文台

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