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题名: TOWARD TIGHT GAMMA-RAY BURST LUMINOSITY RELATIONS
作者: Qi Shi(祈石)1, 2, 3; Lu Tan(陆埮)1, 2, 3
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2012-04-01
卷号: 749, 期号:2
关键词: gamma-ray burst: general
学科分类: Astronomy & Astrophysics
DOI: 10.1088/0004-637X/749/2/99
文章类型: Article
英文摘要: The large scatters of luminosity relations of gamma-ray bursts (GRBs) have been one of the most important reasons preventing the extensive application of GRBs in cosmology. Many efforts have been made to seek tight luminosity relations. With the latest sample of 116 GRBs with measured redshift and spectral parameters, we investigate 6 two-dimensional (2D) correlations and 14 derived three-dimensional (3D) correlations of GRBs to explore the possibility of decreasing the intrinsic scatters of the luminosity relations of GRBs. We find the 3D correlation of E-peak-tau(RT)-L to be evidently tighter (at the 2 sigma confidence level) than its corresponding 2D correlations, i.e., the E-peak-L and tau(RT)-L correlations. In addition, the coefficients before the logarithms of E-peak and tau(RT) in the Epeak-tRT-L correlation are almost exact opposites of each other. Inputting this situation as a prior reduces the relation to L alpha (E'(peak)/tau'(RT))(0.842 + 0.064), where E'(peak) and tau'(RT) denote the peak energy and minimum rise time in the GRB rest frame. We discuss how our findings can be interpreted/understood in the framework of the definition of the luminosity (energy released in units of time). Our argument about the connection between the luminosity relations of GRBs and the definition of the luminosity provides a clear direction for exploring tighter luminosity relations of GRBs in the future.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: DARK ENERGY ; COSMOLOGICAL PARAMETERS ; STANDARD CANDLES ; PEAK LUMINOSITY ; HUBBLE DIAGRAM ; LIGHT CURVES ; REDSHIFT ; EVOLUTION ; SUPERNOVAE ; DISCOVERY
收录类别: SCI
语种: 英语
WOS记录号: WOS:000302785700004
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/10970
Appears in Collections:陆埮_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Nanjing Univ, Joint Ctr Particle Nucl Phys & Cosmol, Purple Mt Observ, Nanjing 210093, Jiangsu, Peoples R China
3.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Nanjing 210008, Peoples R China

Recommended Citation:
祁 石、陆 埮.Toward tight gamma-ray burst Luminosity relations ,ApJ., 749, 99 (2012) ,2012,749(99):
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