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题名: Testing X-ray measurements of galaxy cluster gas mass fraction using the cosmic distance-duality relation
作者: Wang, X ;  Meng, XL ;  Huang, YF ;  Zhang, TJ
刊名: RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期: 2013
卷号: 13, 期号:9, 页码:1013-1024
关键词: HUBBLE-SPACE-TELESCOPE ;  COSMOLOGICAL PARAMETERS ;  DARK-ENERGY ;  BARYON FRACTION ;  IA SUPERNOVAE ;  CONSTRAINTS ;  CONSTANT ;  SAMPLE ;  SIMULATIONS ;  EVOLUTION
学科分类: Physics
通讯作者: Wang, X (reprint author), Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China.
部门归属: [Wang, Xin; Huang, Yong-Feng] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China; [Wang, Xin; Meng, Xiao-Lei; Zhang, Tong-Jie] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China; [Wang, Xin; Meng, Xiao-Lei] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China; [Zhang, Tong-Jie] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China
英文摘要: We propose a consistency test for some recent X-ray gas mass fraction (f(gas)) measurements in galaxy clusters, using the cosmic distance-duality relation, eta(theory) = D-L (1 + z)(-2)/D-A, with luminosity distance (D-L) data from the Union2 compilation of type Ia supernovae. We set eta(theory) equivalent to 1, instead of assigning any red-shift parameterizations to it, and constrain the cosmological information preferred by f(gas) data along with supernova observations. We adopt a new binning method in the reduction of the Union2 data, in order to minimize the statistical errors. Four data sets of X-ray gas mass fraction, which are reported by Allen et al. (two samples), LaRoque et al. and Ettori et al., are analyzed in detail in the context of two theoretical models of f(gas). The results from the analysis of Allen et al.'s samples demonstrate the feasibility of our method. It is found that the preferred cosmology by LaRoque et al.'s sample is consistent with its reference cosmology within the 1 sigma confidence level. However, for Ettori et al.'s f(gas) sample, the inconsistency can reach more than a 3 sigma confidence level and this dataset shows special preference to an Omega(Delta) = 0 cosmology.
资助者: National Basic Research Program of China (973 program) [2009CB824800, 2012CB821804]; National Natural Science Foundation of China [11033002, 11173006]; Fundamental Research Funds for the Central Universities
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000323757800001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15289
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Recommended Citation:
Wang, X,Meng, XL,Huang, YF,et al. Testing X-ray measurements of galaxy cluster gas mass fraction using the cosmic distance-duality relation[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2013,13(9):1013-1024.
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