中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Is Bremsstrahlung a Possible Mechanism to Explain the Thermal Feature in the GRB 130925A X-Ray Afterglow?

文献类型:期刊论文

作者Liu JY(刘杰英)1,2,3; Mao JR(毛基荣)1,2,3
刊名The Astrophysical Journal
出版日期2019-06-20
卷号878期号:2
ISSN号0004-637X
关键词gamma-ray burst: general gamma-ray burst: individual (GRB 130925A) radiation mechanisms: thermal
DOI10.3847/1538-4357/ab21bb
产权排序第1完成单位
文献子类Article
英文摘要

It has been reported that some X-ray spectra of gamma-ray burst (GRB) afterglows cannot be fitted by a simple power law. A blackbody component is added to precisely fit the thermal feature in these spectra. Alternatively, we propose that bremsstrahlung radiation can also be one possible mechanism to explain the thermal component of the GRB X-ray afterglow. In particular, we examine the X-ray afterglow of the ultra-long GRB 130925A in this paper. By our calculation, we find that the X-ray thermal component observed by both Swift-XRT and NuSTAR can be well explained by the bremsstrahlung radiation. Our results indicate that the GRBs with the bremsstrahlung emission in the X-ray afterglow could be born in a metal-rich and dusty environment.

学科主题天文学 ; 天体物理学 ; 高能天体物理学
URL标识查看原文
资助项目National Natural Science Foundation of China[11303086] ; National Natural Science Foundation of China[11673062] ; Hundred Talent Program of Chinese Academy of Sciences, the Major Program of Chinese Academy of Sciences[KJZD-EW-M06] ; Oversea Talent Program of Yunnan Province
语种英语
出版者The American Astronomical Society
WOS记录号IOP:0004-637X-878-2-AB21BB
资助机构National Natural Science Foundation of China[11303086, 11673062] ; Hundred Talent Program of Chinese Academy of Sciences, the Major Program of Chinese Academy of Sciences[KJZD-EW-M06] ; Oversea Talent Program of Yunnan Province
源URL[http://ir.ynao.ac.cn/handle/114a53/20326]  
专题云南天文台_恒星物理研究组
云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Mao JR(毛基荣)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, Yunnan Province, People's Republic of China;
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
推荐引用方式
GB/T 7714
Liu JY,Mao JR. Is Bremsstrahlung a Possible Mechanism to Explain the Thermal Feature in the GRB 130925A X-Ray Afterglow?[J]. The Astrophysical Journal,2019,878(2).
APA Liu JY,&Mao JR.(2019).Is Bremsstrahlung a Possible Mechanism to Explain the Thermal Feature in the GRB 130925A X-Ray Afterglow?.The Astrophysical Journal,878(2).
MLA Liu JY,et al."Is Bremsstrahlung a Possible Mechanism to Explain the Thermal Feature in the GRB 130925A X-Ray Afterglow?".The Astrophysical Journal 878.2(2019).

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来源:云南天文台

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