NAOC Open IR
Testing backreaction effects with observational Hubble parameter data
Cao, Shu-Lei2; Teng, Huan-Yu2; Wan, Hao-Yi2,4; Yu, Hao-Ran3; Zhang, Tong-Jie1,2
2018-02-26
Source PublicationEUROPEAN PHYSICAL JOURNAL C
ISSN1434-6044
Volume78Issue:2Pages:11
AbstractThe spatially averaged inhomogeneous Universe includes a kinematical backreaction term Q(D) that is relate to the averaged spatial Ricci scalar < R >(D) in the framework of general relativity. Under the assumption that Q(D) and < R >(D) obey the scaling laws of the volume scale factor a(D), a direct coupling between them with a scaling index n is remarkable. In order to explore the generic properties of a backreaction model for explaining the accelerated expansion of the Universe, we exploit two metrics to describe the late time Universe. Since the standard FLRW metric cannot precisely describe the late time Universe on small scales, the template metric with an evolving curvature parameter kappa(D)(t) is employed. However, we doubt the validity of the prescription for kappa(D), which motivates us apply observational Hubble parameter data (OHD) to constrain parameters in dust cosmology. First, for FLRW metric, by getting best-fit constraints of Omega(D0)(m) = 0.25(-0.03)(+0.03), n = 0.02(-0.66)(+0.69), and H-D0 = 70.54(-3.97)(+4.24) km s(-1) Mpc(-1), the evolutions of parameters are explored. Second, in template metric context, by marginalizing over H-D0 as a prior of uniform distribution, we obtain the best-fit values of n = -1.22(-0.41)(+0.68) and Omega(D0)(m) = 0.12(-0.02)(+0.04). Moreover, we utilize three different Gaussian priors of H-D0, which result in different best-fits of n, but almost the same best-fit value of Omega(D0)(m) similar to 0.12. Also, the absolute constraints without marginalization of parameter are obtained: n = -1.1(-0.50)(+0.58) and Omega(D0)(m) = 0.13 +/- 0.03. With these constraints, the evolutions of the effective deceleration parameter q(D) indicate that the backreaction can account for the accelerated expansion of the Universe without involving extra dark energy component in the scaling solution context. Nevertheless, the results also verify that the prescription of kappa(D) is insufficient and should be improved.
Funding OrganizationNational Science Foundation of China ; National Science Foundation of China ; Key R&D Program of China ; Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; National Science Foundation of China ; National Science Foundation of China ; Key R&D Program of China ; Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; National Science Foundation of China ; National Science Foundation of China ; Key R&D Program of China ; Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; National Science Foundation of China ; National Science Foundation of China ; Key R&D Program of China ; Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund
DOI10.1140/epjc/s10052-018-5616-4
WOS KeywordDARK ENERGY ; GENERAL-RELATIVITY ; CONSTRAINTS ; COSMOLOGIES ; SUPERNOVAE ; CONSTANT ; GALAXIES ; LAMBDA
Language英语
Funding ProjectNational Science Foundation of China[11573006] ; National Science Foundation of China[11528306] ; Key R&D Program of China[2017YFA0402600] ; Fundamental Research Funds for the Central Universities ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund
Funding OrganizationNational Science Foundation of China ; National Science Foundation of China ; Key R&D Program of China ; Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; National Science Foundation of China ; National Science Foundation of China ; Key R&D Program of China ; Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; National Science Foundation of China ; National Science Foundation of China ; Key R&D Program of China ; Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; National Science Foundation of China ; National Science Foundation of China ; Key R&D Program of China ; Key R&D Program of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund
WOS Research AreaPhysics
WOS SubjectPhysics, Particles & Fields
WOS IDWOS:000426485000002
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/37230
Collection中国科学院国家天文台
Corresponding AuthorZhang, Tong-Jie
Affiliation1.Dezhou Univ, Dezhou 253023, Peoples R China
2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
3.Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Cao, Shu-Lei,Teng, Huan-Yu,Wan, Hao-Yi,et al. Testing backreaction effects with observational Hubble parameter data[J]. EUROPEAN PHYSICAL JOURNAL C,2018,78(2):11.
APA Cao, Shu-Lei,Teng, Huan-Yu,Wan, Hao-Yi,Yu, Hao-Ran,&Zhang, Tong-Jie.(2018).Testing backreaction effects with observational Hubble parameter data.EUROPEAN PHYSICAL JOURNAL C,78(2),11.
MLA Cao, Shu-Lei,et al."Testing backreaction effects with observational Hubble parameter data".EUROPEAN PHYSICAL JOURNAL C 78.2(2018):11.
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