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

doi:10.3847/1538-4357/ad14fb

YNAO OpenIR > 星系类星体研究组

	One Fits All: A Unified Synchrotron Model Explains GRBs with FRED-shape Pulses
	Yan, Zhen-Yu 1,2; Yang, Jun 1,2; Zhao XH(赵晓红)3,4,5 ; Meng, Yan-Zhi 1,2; Zhang, Bin-Bin 1,2,6
发表期刊	ASTROPHYSICAL JOURNAL
	2024-02-01
卷号	962 期号:1
DOI	10.3847/1538-4357/ad14fb
产权排序	第3完成单位
收录类别	SCI
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.
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
项目资助者	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
语种	英语
学科领域	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
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:001157858600001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	GAMMA-RAY BURST ; PROMPT EMISSION-SPECTRA ; SCALE MAGNETIC-FIELDS ; INTERNAL SHOCKS ; COMPREHENSIVE ANALYSIS ; PHOTOSPHERE EMISSION ; RADIATION ; CATALOG ; ORIGIN ; EVOLUTION
引用统计	被引频次：2[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/114a53/26463
专题	星系类星体研究组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; [email protected]; 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; [email protected]; 4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, 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.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, 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).

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One Fits All_ A Unif（5588KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览请求全文