دورية أكاديمية
Synchrotron Radiation Dominates the Extremely Bright GRB 221009A
| العنوان: | Synchrotron Radiation Dominates the Extremely Bright GRB 221009A |
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| المؤلفون: | Yang, Jun, Zhao XH(赵晓红), Yan, Zhenyu, Wang, Xiangyu Ivy, Zhang, Yan-Qiu, An, Zheng-Hua, Cai, Ce, Li, Xin-Qiao, Li, Zihan, Liu, Jia-Cong, Liu, Zi-Ke, Ma, Xiang, Meng, Yan-Zhi, Peng, Wen-Xi, Qiao, Rui, Shao, Lang, Song, Li-Ming, Tan, Wen-Jun, Wang, Ping, Wang, Chen-Wei, Wen, Xiang-Yang, Xiao, Shuo, Xue, Wang-Chen, Yang, Yu-Han, Yin, Yi-Han Iris, Zhang, Bing, Zhang, Fan, Zhang, Shuai, Zhang, Shuang-Nan, Zheng, Chao, Zheng, Shi-Jie, Xiong, Shao-Lin, Zhang, Bin-Bin |
| بيانات النشر: | IOP Publishing Ltd |
| سنة النشر: | 2023 |
| المجموعة: | Yunnan Observatories: YNAO OpenIR (Chinese Academy of Sciences, CAS) / 中国科学院云南天文台机构知识库 |
| مصطلحات موضوعية: | 天文学, 天文学::星系与宇宙学, 理学, 理学::天文学, Astronomy & Astrophysics, GAMMA-RAY BURST, PROMPT EMISSION, PHYSICAL ORIGINS, SPECTRAL CATALOG, BREAKS, MODEL, PHOTOSPHERES, CONSISTENCY, EFFICIENT, OUTFLOW |
| الوصف: | The brightest gamma-ray burst, GRB 221009A, has spurred numerous theoretical investigations, with particular attention paid to the origins of ultrahigh-energy TeV photons during the prompt phase. However, analyzing the mechanism of radiation of photons in the similar to MeV range has been difficult because the high flux causes pileup and saturation effects in most GRB detectors. In this Letter, we present systematic modeling of the time-resolved spectra of the GRB using unsaturated data obtained from the Fermi Gamma-ray Burst Monitor (precursor) and SATech-01/GECAM-C (main emission and flare). Our approach incorporates the synchrotron radiation model, which assumes an expanding emission region with relativistic speed and a global magnetic field that decays with radius, and successfully fits such a model to the observational data. Our results indicate that the spectra of the burst are fully in accordance with a synchrotron origin from relativistic electrons accelerated at a large emission radius. The lack of thermal emission in the prompt emission spectra supports a Poynting flux-dominated jet composition. |
| نوع الوثيقة: | article in journal/newspaper report |
| اللغة: | English |
| العلاقة: | ASTROPHYSICAL JOURNAL LETTERS; http://ir.ynao.ac.cn/handle/114a53/25903Test; https://dx.doi.org/10.3847/2041-8213/acc84bTest |
| DOI: | 10.3847/2041-8213/acc84b |
| الإتاحة: | https://doi.org/10.3847/2041-8213/acc84bTest http://ir.ynao.ac.cn/handle/114a53/25903Test |
| حقوق: | cn.org.cspace.api.content.CopyrightPolicy@759ca854 |
| رقم الانضمام: | edsbas.65DB860C |
| قاعدة البيانات: | BASE |
| DOI: | 10.3847/2041-8213/acc84b |
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