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1دورية أكاديمية
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
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.
العلاقة: ASTROPHYSICAL JOURNAL LETTERS; http://ir.ynao.ac.cn/handle/114a53/25903Test; https://dx.doi.org/10.3847/2041-8213/acc84bTest
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2تقرير
المؤلفون: Wang, Bo-Jun, Xu, Heng, Jiang, Jin-Chen, Xu, Jiang-Wei, Niu, Jia-Rui, Chen, Ping, Lee, Ke-Jia, Zhang, Bing, Zhu, Wei-Wei, Dong, Su-Bo, Zhang, Chun-Feng, Fu, Hai, Zhou, De-Jiang, Zhang, Yong-Kun, Wang, Pei, Feng, Yi, Li, Ye, Li, Dong-Zi, Lu, Wen-Bin, Yang, Yuan-Pei, Caballero, R. N., Cai, Ce, Chen, Mao-Zheng, Dai, Zi-Gao, Esamdin, A., Gan, Heng-Qian, Han, Jin-Lin, Hao LF(郝龙飞), Huang YX(黄玉祥), Jiang, Peng, Li, Cheng-Kui, Li, Di, Li, Hui, Li, Xin-Qiao, Li ZX(李志玄), Liu, Zhi-Yong, Luo, Rui, Men, Yun-Peng, Niu, Chen-Hui, Peng, Wen-Xi, Qian, Lei, Song, Li-Ming, Sun, Jing-Hai, Wang, Fa-Yin, Wang M(汪敏), Wang, Na, Wang, Wei-Yang, Wu, Xue-Feng, Xiao, Shuo, Xiong, Shao-Lin, Xu YH(徐永华), Xu, Ren-Xin, Yang, Jun, Yang, Xuan, Yao, Rui, Yi, Qi-Bin, Yue, You-Ling, Yu, Dong-Jun, Yu, Wen-Fei, Yuan, Jian-Ping, Zhang, Bin-Bin, Zhang, Song-Bo, Zhang, Shuang-Nan, Zhao, Yi, Zheng, Wei-Kang, Zhu, Yan, Zou, Jin-Hang
مصطلحات موضوعية: fast radio burst, FAST, 天文学, 天文学::射电天文学, 天文学::射电天文学::射电天体物理学, 理学, 理学::天文学, Physics, Multidisciplinary
الوصف: Fast radio bursts (FRBs) are highly dispersed millisecond-duration radio bursts,([1,2]) of which the physical origin is still not fully understood. FRB 20201124A is one of the most actively repeating FRBs. In this paper, we present the collection of 1863 burst dynamic spectra of FRB 20201124A measured with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The current collection, taken from the observation during the FRB active phase from April to June 2021, is the largest burst sample detected for any FRB so far. The standard PSRFITs format is adopted, including dynamic spectra of the burst, and the time information of the dynamic spectra, in addition, mask files help readers to identify the pulse positions are also provided.
العلاقة: CHINESE PHYSICS B; http://ir.ynao.ac.cn/handle/114a53/25858Test; https://dx.doi.org/10.1088/1674-1056/aca7edTest
