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COSMIC EVOLUTION OF LONG GAMMA-RAY BURST LUMINOSITY
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, Xue-Feng3,4; Liang, En-Wei1,2
2016-03-20
Source PublicationASTROPHYSICAL JOURNAL
Volume820Issue:1
AbstractThe 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.
KeywordGamma-ray Burst: General Methods: Statistical Stars: Formation
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-637X/820/1/66
WOS KeywordSTAR-FORMATION RATE ; REDSHIFT DISTRIBUTION ; COMPREHENSIVE ANALYSIS ; HOST GALAXY ; METALLICITY EVOLUTION ; FORMATION HISTORY ; PHYSICAL ORIGINS ; PEAK LUMINOSITY ; SWIFT ERA ; ENERGY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000372787000065
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16181
Collection南极天文中心
Affiliation1.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
Recommended Citation
GB/T 7714
Deng, Can-Min,Wang, Xiang-Gao,Guo, Bei-Bei,et al. COSMIC EVOLUTION OF LONG GAMMA-RAY BURST LUMINOSITY[J]. ASTROPHYSICAL JOURNAL,2016,820(1).
APA Deng, Can-Min.,Wang, Xiang-Gao.,Guo, Bei-Bei.,Lu, Rui-Jing.,Wang, Yuan-Zhu.,...&Liang, En-Wei.(2016).COSMIC EVOLUTION OF LONG GAMMA-RAY BURST LUMINOSITY.ASTROPHYSICAL JOURNAL,820(1).
MLA Deng, Can-Min,et al."COSMIC EVOLUTION OF LONG GAMMA-RAY BURST LUMINOSITY".ASTROPHYSICAL JOURNAL 820.1(2016).
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