THE GAMMA-RAY BURST HUBBLE DIAGRAM AND ITS IMPLICATIONS FOR COSMOLOGY

	THE GAMMA-RAY BURST HUBBLE DIAGRAM AND ITS IMPLICATIONS FOR COSMOLOGY
	Wei, Jun-Jie 1; Wu, Xue-Feng1,2,3 ; Melia, Fulvio 4,5
刊名	ASTROPHYSICAL JOURNAL
	2013-07-20
卷号	772 期号:1 页码:0
关键词	cosmology: observations cosmology: theory dark energy early universe gamma-ray burst: general
ISSN号	0004-637X
通讯作者	Wei, JJ (reprint author), Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China. Email: jjwei@pmo.ac.cn ; xfwu@pmo.ac.cn ; fmelia@email.arizona.edu
英文摘要	In this paper, we continue to build support for the proposal to use gamma-ray bursts (GRBs) as standard candles in constructing the Hubble diagram at redshifts beyond the current reach of Type Ia supernova observations. We confirm that correlations among certain spectral and light-curve features can indeed be used as luminosity indicators, and demonstrate from the most up-to-date GRB sample appropriate for this work that the Lambda CDM model optimized with these data is characterized by parameter values consistent with those in the concordance model. Specifically, we find that (Omega(m), Omega(Lambda)) approximate to (0.25(-0.06)(+0.05), 0.75(-0.05)(+0.06)), which are consistent, to within 1 sigma, with (0.29, 0.71) obtained from the 9 yr Wilkinson Microwave Anisotropy Probe data. We also carry out a comparative analysis between Lambda CDM and the R-h = ct universe and find that the optimal Lambda CDM model fits the GRB Hubble diagram with a reduced chi(2)(dof) approximate to 2.26, whereas the fit using R-h = ct results in a chi(2)(dof) approximate to 2.14. In both cases, about 20% of the events lie at least 2 sigma away from the best-fit curves, suggesting that either some contamination by non-standard GRB luminosities is unavoidable or that the errors and intrinsic scatter associated with the data are being underestimated. With these optimized fits, we use three statistical tools-the Akaike information criterion, the Kullback information criterion, and the Bayes information criterion-to show that, based on the GRB Hubble diagram, the likelihood of R-h = ct being closer to the correct model is similar to 85%-96%, compared to similar to 4%-15% for Lambda CDM.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	HOST GALAXY ; OPTICAL AFTERGLOW ; DARK ENERGY ; E-P,E-I-E-ISO CORRELATION ; LUMINOSITY RELATIONS ; INTRINSIC SPECTRA ; MODEL SELECTION ; SPACE-TELESCOPE ; PEAK LUMINOSITY ; IA SUPERNOVAE
收录类别	SCI
语种	英语
WOS记录号	WOS:000321673700043
公开日期	2014-01-08
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/9912]
专题	紫金山天文台_南极天文中心
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Ctr Antarctic Astron, Nanjing 210008, Jiangsu, Peoples R China 3.Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210008, Jiangsu, Peoples R China 4.Univ Arizona, Program Appl Math, Dept Phys, Tucson, AZ 85721 USA 5.Univ Arizona, Dept Astron, Tucson, AZ 85721 USA
推荐引用方式 GB/T 7714	Wei, Jun-Jie,Wu, Xue-Feng,Melia, Fulvio. THE GAMMA-RAY BURST HUBBLE DIAGRAM AND ITS IMPLICATIONS FOR COSMOLOGY[J]. ASTROPHYSICAL JOURNAL,2013,772(1):0.
APA	Wei, Jun-Jie,Wu, Xue-Feng,&Melia, Fulvio.(2013).THE GAMMA-RAY BURST HUBBLE DIAGRAM AND ITS IMPLICATIONS FOR COSMOLOGY.ASTROPHYSICAL JOURNAL,772(1),0.
MLA	Wei, Jun-Jie,et al."THE GAMMA-RAY BURST HUBBLE DIAGRAM AND ITS IMPLICATIONS FOR COSMOLOGY".ASTROPHYSICAL JOURNAL 772.1(2013):0.