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题名: COSMIC EVOLUTION OF LONG GAMMA-RAY BURST LUMINOSITY
作者: Deng, Can-Min1, 2; Wang, Xiang-Gao1, 2; Guo, Bei-Bei1, 2; Lu, Rui-Jing1, 2; Wang, Yuan-Zhu1, 2; Wei, Jun-Jie3, 4; Wu XueFeng(吴雪峰)3, 4; Liang, En-Wei1, 2
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2016-03-20
卷号: 820, 期号:1
关键词: gamma-ray burst: general ; methods: statistical ; stars: formation
DOI: 10.3847/0004-637X/820/1/66
文章类型: Article
英文摘要: The cosmic evolution of gamma-ray burst (GRB) luminosity is essential for revealing the GRB physics and for using GRBs as cosmological probes. We investigate the luminosity evolution of long GRBs with a large sample of 258 Swift/BAT GRBs. By describing the peak luminosity evolution of individual GRBs as L-p proportional to (1 + z)(k) we get k = 1.49 +/- 0.19 using the nonparametric tau statistics method without considering observational biases of GRB trigger and redshift measurement. By modeling these biases with the observed peak flux and characterizing the peak luminosity function of long GRBs as a smoothly broken power. law with a break that evolves as L-b proportional to (1 + z)(kb), we obtain k(b) = 1.14(0.47)(+0.99) through simulations based on the assumption that the long GRB rate follows the star formation rate incorporating. the cosmic metallicity history. The derived k and k(b) values are systematically smaller than those. reported in previous papers. By removing the observational biases of the GRB trigger and redshift measurement based on our simulation analysis, we generate mock complete samples of 258 and 1000 GRBs to examine how these biases affect the tau statistics method. We get k = 0.94. +/- 0.14 and k = 0.80 +/- 0.09 for the two samples, indicating that these observational biases may lead to overestimating. the k value. With the large uncertainty of kb derived from our simulation analysis, one. cannot even convincingly argue for a robust evolution feature of the GRB luminosity.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: STAR-FORMATION RATE ; REDSHIFT DISTRIBUTION ; COMPREHENSIVE ANALYSIS ; HOST GALAXY ; METALLICITY EVOLUTION ; FORMATION HISTORY ; PHYSICAL ORIGINS ; PEAK LUMINOSITY ; SWIFT ERA ; ENERGY
收录类别: SCI
项目资助者: National Basic Research Program (973 Programme) of China(2014CB845800) ; National Natural Science Foundation of China(11533003 ; Guangxi Science Foundation(2013GXNSFFA019001 ; One-Hundred-Talents Program ; Youth Innovation Promotion Association ; Strategic Priority Research Program "The Emergence of Cosmological Structures"(XDB09000000) ; Key Laboratory for the Structure and Evolution of Celestial Objects of the Chinese Academy of Sciences ; 11363002 ; 2014GXNSFAA118011) ; 11303005 ; U1331202 ; 11322328 ; 11373036)
语种: 英语
WOS记录号: WOS:000372787000065
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16181
Appears in Collections:南极天文中心_期刊论文

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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.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
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