NAOC Open IR  > 空间科学研究部
THE HISTORY OF GRB OUTFLOWS: EJECTION LORENTZ FACTOR AND RADIATION LOCATION OF X-RAY FLARES
Mu, Hui-Jun1,2,6,7; Lin, Da-Bin1,2; Xi, Shao-Qiang1,3; Lin, Ting-Ting1,2; Wang, Yuan-Zhu1,2; Liang, Yun-Feng4; Lu, Lian-Zhong1,2; Zhang, Jin5; Liang, En-Wei1,2,5
2016-11-01
发表期刊ASTROPHYSICAL JOURNAL
卷号831期号:1
摘要We present time-resolved spectral analysis of the steep decay segments of 29 bright X-ray flares of gamma-ray bursts (GRBs) observed with the Swift/X-ray telescope, and model their light curves and spectral index evolution behaviors with the curvature effect model. Our results show that the observed rapid flux decay and strong spectral index evolution with time can be well fitted with this model, and the derived characteristic timescales (t(c)) are in the range of 23 similar to 264 s. Using an empirical relation between the peak luminosity and the Lorentz factor derived from the prompt gamma-rays, we estimate the Lorentz factors of the flares (Gamma(X)). We obtain Gamma(X) = 17 similar to 87 with a median value of 52, which is smaller than the initial Lorentz factors of prompt gamma-ray fireballs. With the derived tc and Gamma(X), we constrain the radiating regions of 13 X-ray flares, yielding R-X = (0.2 similar to 1.1) x 10(16) cm, which are smaller than the radii of the afterglow fireballs at the peak times of the flares. A long evolution feature from prompt gamma-ray phase to the X-ray epoch is found by incorporating our results with a sample of GRBs whose initial Lorentz factors are available in the literature, i.e., Gamma proportional to[t(p) (1 + z)](-0.69 +/- 0.06). These results may shed light on the long-term evolution of GRB central engines.
文章类型Article
关键词Gamma-ray Burst: General
WOS标题词Science & Technology ; Physical Sciences
资助者National Basic Research Program of China (973 Program)(2014CB845800) ; National Basic Research Program of China (973 Program)(2014CB845800) ; National Natural Science Foundation of China(11533003 ; National Natural Science Foundation of China(11533003 ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Guangxi Science Foundation(2016GXNSFDA380027 ; Guangxi Science Foundation(2016GXNSFDA380027 ; Scientific Research Foundation of Guangxi University(XJZ140331) ; Scientific Research Foundation of Guangxi University(XJZ140331) ; 11403005 ; 11403005 ; 2014GXNSFBA118004 ; 2014GXNSFBA118004 ; 11573034 ; 11573034 ; 2013GXNSFFA019001) ; 2013GXNSFFA019001) ; 11373036 ; 11373036 ; 11163001) ; 11163001) ; National Basic Research Program of China (973 Program)(2014CB845800) ; National Basic Research Program of China (973 Program)(2014CB845800) ; National Natural Science Foundation of China(11533003 ; National Natural Science Foundation of China(11533003 ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Guangxi Science Foundation(2016GXNSFDA380027 ; Guangxi Science Foundation(2016GXNSFDA380027 ; Scientific Research Foundation of Guangxi University(XJZ140331) ; Scientific Research Foundation of Guangxi University(XJZ140331) ; 11403005 ; 11403005 ; 2014GXNSFBA118004 ; 2014GXNSFBA118004 ; 11573034 ; 11573034 ; 2013GXNSFFA019001) ; 2013GXNSFFA019001) ; 11373036 ; 11373036 ; 11163001) ; 11163001)
DOI10.3847/0004-637X/831/1/111
关键词[WOS]BURST PROMPT EMISSION ; INTERNAL-SHOCK MODEL ; SWIFT XRT DATA ; COMPREHENSIVE ANALYSIS ; AFTERGLOW ONSET ; ENGINE ACTIVITY ; HOST GALAXIES ; 1ST SURVEY ; E-PEAK ; LONG
收录类别SCI
语种英语
资助者National Basic Research Program of China (973 Program)(2014CB845800) ; National Basic Research Program of China (973 Program)(2014CB845800) ; National Natural Science Foundation of China(11533003 ; National Natural Science Foundation of China(11533003 ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Guangxi Science Foundation(2016GXNSFDA380027 ; Guangxi Science Foundation(2016GXNSFDA380027 ; Scientific Research Foundation of Guangxi University(XJZ140331) ; Scientific Research Foundation of Guangxi University(XJZ140331) ; 11403005 ; 11403005 ; 2014GXNSFBA118004 ; 2014GXNSFBA118004 ; 11573034 ; 11573034 ; 2013GXNSFFA019001) ; 2013GXNSFFA019001) ; 11373036 ; 11373036 ; 11163001) ; 11163001) ; National Basic Research Program of China (973 Program)(2014CB845800) ; National Basic Research Program of China (973 Program)(2014CB845800) ; National Natural Science Foundation of China(11533003 ; National Natural Science Foundation of China(11533003 ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Guangxi Science Foundation(2016GXNSFDA380027 ; Guangxi Science Foundation(2016GXNSFDA380027 ; Scientific Research Foundation of Guangxi University(XJZ140331) ; Scientific Research Foundation of Guangxi University(XJZ140331) ; 11403005 ; 11403005 ; 2014GXNSFBA118004 ; 2014GXNSFBA118004 ; 11573034 ; 11573034 ; 2013GXNSFFA019001) ; 2013GXNSFFA019001) ; 11373036 ; 11373036 ; 11163001) ; 11163001)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000400472900002
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8849
专题空间科学研究部
作者单位1.Guangxi Univ, Dept Phys, GXU NAOC Ctr Astrophys & Space Sci, Nanning 530004, Peoples R China
2.Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
3.Officers Coll CAPF, Dept Math & Phys, Chengdu 610213, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
6.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China
7.Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Fujian, Peoples R China
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Mu, Hui-Jun,Lin, Da-Bin,Xi, Shao-Qiang,et al. THE HISTORY OF GRB OUTFLOWS: EJECTION LORENTZ FACTOR AND RADIATION LOCATION OF X-RAY FLARES[J]. ASTROPHYSICAL JOURNAL,2016,831(1).
APA Mu, Hui-Jun.,Lin, Da-Bin.,Xi, Shao-Qiang.,Lin, Ting-Ting.,Wang, Yuan-Zhu.,...&Liang, En-Wei.(2016).THE HISTORY OF GRB OUTFLOWS: EJECTION LORENTZ FACTOR AND RADIATION LOCATION OF X-RAY FLARES.ASTROPHYSICAL JOURNAL,831(1).
MLA Mu, Hui-Jun,et al."THE HISTORY OF GRB OUTFLOWS: EJECTION LORENTZ FACTOR AND RADIATION LOCATION OF X-RAY FLARES".ASTROPHYSICAL JOURNAL 831.1(2016).
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