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Model-independent Determination of Cosmic Curvature Based on the Pade Approximation
Alternative TitleWOS:000506001500036
Li, Shi-Yu; Li, Yun-Long; Zhang, Tong-Jie; Zhang, Tingting2
Source PublicationASTROPHYSICAL JOURNAL
2019
Volume887Issue:1Pages:36
DOI10.3847/1538-4357/ab5225
ISSN0004-637X
Language英语
KeywordLUMINOUS RED GALAXIES EQUATION-OF-STATE DARK ENERGY CONSTRAINTS CHRONOMETERS
AbstractGiven observations of the standard candles and cosmic chronometers, we apply Pade parameterization to the comoving distance and the Hubble parameter to find out how stringently the constraint is set to the curvature parameter by the data. A weak informative prior is introduced in the modeling process to keep the inference away from the singularities. Bayesian evidence for a different order of Pade parameterizations is evaluated during the inference to select the most suitable parameterization in light of the data. The data we used prefer a parameterization form of comoving distance as D(01()z) = +a(0)z/1 + b(1)z as well as a competitive form D-02(z) = a(0)z/1 + b(1)z + b(2z2). Similar constraints on the spatial curvature parameter are established by those models and given the Hubble constant as a byproduct: Omega(k) = 0.25(-0.13)(+0.14) (68% confidence level; CL), H-0 = 67.7 +/- 2.0 kms(-1) Mpc(-1) (68% CL) for D-01, and Omega(k) = -0.01 +/- 0.13 (68% CL), H-0 = 68.8 +/- 2.0 kms(-1) Mpc(-1) (68% CL) for D-02. The evidence from different models demonstrates the qualitative analysis of Pade parameterizations for the comoving distance.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7578
Collection中国科学院国家空间科学中心
Affiliation1.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
2.Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China
3.PLA Army Engn Univ, Nanjing 210017, Peoples R China
Recommended Citation
GB/T 7714
Li, Shi-Yu,Li, Yun-Long,Zhang, Tong-Jie,et al. Model-independent Determination of Cosmic Curvature Based on the Pade Approximation[J]. ASTROPHYSICAL JOURNAL,2019,887(1):36.
APA Li, Shi-Yu,Li, Yun-Long,Zhang, Tong-Jie,&Zhang, Tingting.(2019).Model-independent Determination of Cosmic Curvature Based on the Pade Approximation.ASTROPHYSICAL JOURNAL,887(1),36.
MLA Li, Shi-Yu,et al."Model-independent Determination of Cosmic Curvature Based on the Pade Approximation".ASTROPHYSICAL JOURNAL 887.1(2019):36.
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