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One Fits All: A Unified Synchrotron Model Explains GRBs with FRED-shape Pulses

文献类型：期刊论文

作者Yan, Zhen-Yu1,2; Yang, Jun1,2; Zhao XH(赵晓红)3,5,6; Meng, Yan-Zhi1,2; Zhang, Bin-Bin1,2,4
刊名ASTROPHYSICAL JOURNAL
出版日期2024-02-01
卷号962期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/ad14fb
产权排序第3完成单位
文献子类Article
英文摘要The analysis of gamma-ray burst (GRB) spectra often relies on empirical models lacking a distinct physical explanation. Previous attempts to couple physical models with observed data focus on individual burst studies, fitting models to segmented spectra with independent physical parameters. However, these approaches typically neglect to explain the time evolution of observed spectra. In this study, we propose a novel approach by incorporating the synchrotron radiation model to provide a self-consistent explanation for a selection of single-pulse GRBs. Our study comprehensively tests the synchrotron model under a unified physical condition, such as a single injection event of electrons. By tracing the evolution of cooling electrons in a decaying magnetic field, our model predicts time-dependent observed spectra that align well with the data. Using a single set of physical parameters, our model successfully fits all time-resolved spectra within each burst. Our model suggests that the rising phase of the GRB light curve results from the increasing number of radiating electrons, while the declining phase is attributed to the curvature effect, electron cooling, and the decaying magnetic field. Our model provides a straightforward interpretation of the peak energy's evolution, linked to the decline of the magnetic field and electron cooling due to the expansion of the GRB emission region. Our findings strongly support the notion that spectral and temporal evolution in GRB pulses originates from the expansion of the GRB emission region, with an initial radius of approximately 1015 cm, and synchrotron radiation as the underlying emission mechanism.
学科主题天文学
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 ; PROMPT EMISSION-SPECTRA ; SCALE MAGNETIC-FIELDS ; INTERNAL SHOCKS ; COMPREHENSIVE ANALYSIS ; PHOTOSPHERE EMISSION ; RADIATION ; CATALOG ; ORIGIN ; EVOLUTION
资助项目National Key Research and Development Programs of China[2022YFF0711404]; National Key Research and Development Programs of China[2022SKA0130102]; National SKA Program of China[2022SKA0130100]; National Natural Science Foundation of China[11833003]; National Natural Science Foundation of China[U2038105]; National Natural Science Foundation of China[U1831135]; National Natural Science Foundation of China[12121003]; National Natural Science Foundation of China[12393811]; China Manned Space Project[CMS-CSST-2021-B11]; Fundamental Research Funds for the Central Universities; Program for Innovative Talents and Entrepreneur in Jiangsu; Chinese Academy of Sciences[XDB23040400]; Postgraduate Research & Practice Innovation Program of Jiangsu Province[KYCX23_0117]; School of Astronomy and Space Science at Nanjing University
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP Publishing Ltd
WOS记录号WOS:001157858600001
资助机构National Key Research and Development Programs of China[2022YFF0711404, 2022SKA0130102] ; National SKA Program of China[2022SKA0130100] ; National Natural Science Foundation of China[11833003, U2038105, U1831135, 12121003, 12393811] ; China Manned Space Project[CMS-CSST-2021-B11] ; Fundamental Research Funds for the Central Universities ; Program for Innovative Talents and Entrepreneur in Jiangsu ; Chinese Academy of Sciences[XDB23040400] ; Postgraduate Research & Practice Innovation Program of Jiangsu Province[KYCX23_0117] ; School of Astronomy and Space Science at Nanjing University
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/26463]  
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 210093, People's Republic of China; bbzhang@nju.edu.cn;
2.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, People's Republic of China;
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, People's Republic of China; zhaoxh@ynao.ac.cn;
4.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, People's Republic of China
5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, People's Republic of China;
6.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, People's Republic of China;
推荐引用方式
GB/T 7714		 Yan, Zhen-Yu,Yang, Jun,Zhao XH,et al. One Fits All: A Unified Synchrotron Model Explains GRBs with FRED-shape Pulses[J]. ASTROPHYSICAL JOURNAL,2024,962(1).
APA Yan, Zhen-Yu,Yang, Jun,赵晓红,Meng, Yan-Zhi,&Zhang, Bin-Bin.(2024).One Fits All: A Unified Synchrotron Model Explains GRBs with FRED-shape Pulses.ASTROPHYSICAL JOURNAL,962(1).
MLA Yan, Zhen-Yu,et al."One Fits All: A Unified Synchrotron Model Explains GRBs with FRED-shape Pulses".ASTROPHYSICAL JOURNAL 962.1(2024).

入库方式： OAI收割

来源：云南天文台

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