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A Comprehensive Consistency Check between Synchrotron Radiation and the Observed Gamma-Ray Burst Spectra
Wang, Dao-Zhou1; Zhao XH(赵晓红)2,3; Zhang, Zhao Joseph4; Zhang, Bin-Bin4,5,6; Peng, Zhao-Yang1
发表期刊ASTROPHYSICAL JOURNAL
2022-02-01
卷号926期号:2
DOI10.3847/1538-4357/ac4782
产权排序第2完成单位
收录类别SCI
摘要

We performed a time-resolved spectral analysis of 53 bright gamma-ray bursts (GRBs) observed by Fermi/GBM. Our sample consists of 1117 individual spectra extracted from the finest time slices in each GRB. We fitted them with the synchrotron radiation model by considering the electron distributions in five different cases: monoenergetic, single power law, Maxwellian, traditional fast cooling, and broken power law. Our results were further qualified through the Bayesian information criterion (BIC) by comparing with the fit by empirical models, namely, the so-called Band function and cutoff power-law models. Our study showed that the synchrotron models, except for the fast-cooling case, can successfully fit most observed spectra, with the single power-law case being the most preferred. We also found that the electron distribution indices for the single power-law synchrotron fit in more than half of our spectra exhibit flux-tracking behavior, i.e., the index increases/decreases with the flux increasing/decreasing, implying that the distribution of the radiating electrons is increasingly narrower with time before the flux peaks and becomes more spreading afterward. Our results indicate that the synchrotron radiation is still feasible as a radiation mechanism of the GRB prompt emission phase.

资助项目Chinese Natural Science FoundationNational Natural Science Foundation of China (NSFC)[U1831135] ; Chinese Natural Science FoundationNational Natural Science Foundation of China (NSFC)[11763009] ; Chinese Natural Science FoundationNational Natural Science Foundation of China (NSFC)[11263006] ; Key Laboratory of Colleges and Universities in Yunnan Province for High-energy Astrophysics ; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities[14380046] ; National Key Research and Development Programs of China[2018YFA0404204] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11833003] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[U2038105] ; China Manned Space Project[CMS-CSST-2021-B11] ; Program for Innovative Talents, Entrepreneur in Jiangsu
项目资助者Chinese Natural Science FoundationNational Natural Science Foundation of China (NSFC)[U1831135, 11763009, 11263006] ; Key Laboratory of Colleges and Universities in Yunnan Province for High-energy Astrophysics ; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities[14380046] ; National Key Research and Development Programs of China[2018YFA0404204] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11833003, U2038105] ; China Manned Space Project[CMS-CSST-2021-B11] ; Program for Innovative Talents, Entrepreneur in Jiangsu
语种英语
学科领域天文学 ; 天体物理学 ; 高能天体物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP Publishing Ltd
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS记录号WOS:000759844300001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]PROMPT EMISSION ; PARTICLE-ACCELERATION ; CATALOG ; GRB ; PHOTOSPHERES ; COMPONENT ; OUTFLOW ; SHOCKS
引用统计
被引频次:3[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/114a53/24911
专题星系类星体研究组
通讯作者Zhao XH(赵晓红)
作者单位1.College of Physics and Electronics, Yunnan Normal University, Kunming 650500, People's Republic of China; pengzhaoyang412@163.com;
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming, People's Republic of China; zhaoxh@ynao.ac.cn;
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, People's Republic of China;
4.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, People's Republic of China; bbzhang@nju.edu.cn;
5.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, People's Republic of China;
6.Department of Physics and Astronomy, University of Nevada, Las Vegas, Las Vegas, NV 89154, USA
通讯作者单位中国科学院云南天文台
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Wang, Dao-Zhou,Zhao XH,Zhang, Zhao Joseph,et al. A Comprehensive Consistency Check between Synchrotron Radiation and the Observed Gamma-Ray Burst Spectra[J]. ASTROPHYSICAL JOURNAL,2022,926(2).
APA Wang, Dao-Zhou,Zhao XH,Zhang, Zhao Joseph,Zhang, Bin-Bin,&Peng, Zhao-Yang.(2022).A Comprehensive Consistency Check between Synchrotron Radiation and the Observed Gamma-Ray Burst Spectra.ASTROPHYSICAL JOURNAL,926(2).
MLA Wang, Dao-Zhou,et al."A Comprehensive Consistency Check between Synchrotron Radiation and the Observed Gamma-Ray Burst Spectra".ASTROPHYSICAL JOURNAL 926.2(2022).
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