Cosmic Constraints to the wCDM Model from Strong Gravitational Lensing

doi:http://dx.doi.org/10.1088/0256-307X/33/7/079801

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	Cosmic Constraints to the wCDM Model from Strong Gravitational Lensing
	An, J; Chang, BR; Xu, LX; Xu, LX (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China.; Xu, LX (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
刊名	CHINESE PHYSICS LETTERS
	2016
卷号	33 期号:7 页码:79801
DOI	http://dx.doi.org/10.1088/0256-307X/33/7/079801
英文摘要	We study the cosmic constraint to the wCDM (cold dark matter with a constant equation of state..) model via 118 strong gravitational lensing systems which are compiled from SLACS, BELLS, LSD and SL2S surveys, where the ratio between two angular diameter distances D-obs = D-A(z(l), z(s))/D-A(0, z(s)) is taken as a cosmic observable. To obtain this ratio, we adopt two strong lensing models: one is the singular isothermal sphere model (SIS) and the other one is the power-law density profile (PLP) model. Via the Markov chain Monte Carlo method, the posterior distribution of the cosmological model parameters space is obtained. The results show that the cosmological model parameters are not sensitive to the parameterized forms of the power-law index gamma. Furthermore, the PLP model gives a relatively tighter constraint to the cosmological parameters than that of the SIS model. The predicted value of Omega(m) = 0.31(-0.24)(+0.44) by the SIS model is compatible with that obtained by Planck2015: Omega(m) = 0.313 +/- 0.013. However, the value of Omega(m) = 0.15(-0.11)(+0.13) based on the PLP model is smaller and has 1.25 sigma tension with that obtained by Planck2015.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21605]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Xu, LX (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China.; Xu, LX (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	An, J,Chang, BR,Xu, LX,et al. Cosmic Constraints to the wCDM Model from Strong Gravitational Lensing[J]. CHINESE PHYSICS LETTERS,2016,33(7):79801.
APA	An, J,Chang, BR,Xu, LX,Xu, LX ,&Xu, LX .(2016).Cosmic Constraints to the wCDM Model from Strong Gravitational Lensing.CHINESE PHYSICS LETTERS,33(7),79801.
MLA	An, J,et al."Cosmic Constraints to the wCDM Model from Strong Gravitational Lensing".CHINESE PHYSICS LETTERS 33.7(2016):79801.