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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.
Cosmic Constraints to the wCDM Model from Strong Gravitational Lensing
Source PublicationCHINESE PHYSICS LETTERS
Language英语
AbstractWe 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.
2016
Volume33Issue:7Pages:79801
Subject AreaPhysics
DOIhttp://dx.doi.org/10.1088/0256-307X/33/7/079801
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China [11275035] ; National Natural Science Foundation of China [11275035] ; National Natural Science Foundation of China [11275035] ; National Natural Science Foundation of China [11275035]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/21605
Collection理论物理所科研产出_SCI论文
Corresponding AuthorXu, 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.
Recommended Citation
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.
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