ITP OpenIR  > SCI期刊论文
Yang, T; Guo, ZK; Cai, RG; Yang, T (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
Reconstructing the interaction between dark energy and dark matter using Gaussian processes
Source PublicationPHYSICAL REVIEW D
Language英语
AbstractWe present a nonparametric approach to reconstruct the interaction between dark energy and dark matter directly from SNIa Union 2.1 data using Gaussian processes, which is a fully Bayesian approach for smoothing data. In this method, once the equation of state (w) of dark energy is specified, the interaction can be reconstructed as a function of redshift. For the decaying vacuum energy case with w = -1, the reconstructed interaction is consistent with the standard Lambda CDM model, namely, there is no evidence for the interaction. This also holds for the constant w cases from -0.9 to -1.1 and for the Chevallier-Polarski-Linder (CPL) parametrization case. If the equation of state deviates obviously from -1, the reconstructed interaction exists at 95% confidence level. This shows the degeneracy between the interaction and the equation of state of dark energy when they get constraints from the observational data.
2015
Volume91Issue:12Pages:123533
Subject AreaAstronomy & Astrophysics ; Physics
DOIhttp://dx.doi.org/10.1103/PhysRevD.91.123533
Indexed BySCI
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB09000000] ; National Natural Science Foundation of China [11175225, 11335012] ; National Natural Science Foundation of China [11175225, 11335012] ; National Natural Science Foundation of China [11175225, 11335012] ; National Natural Science Foundation of China [11175225, 11335012]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/20956
CollectionSCI期刊论文
Corresponding AuthorYang, T (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Yang, T,Guo, ZK,Cai, RG,et al. Reconstructing the interaction between dark energy and dark matter using Gaussian processes[J]. PHYSICAL REVIEW D,2015,91(12):123533.
APA Yang, T,Guo, ZK,Cai, RG,&Yang, T .(2015).Reconstructing the interaction between dark energy and dark matter using Gaussian processes.PHYSICAL REVIEW D,91(12),123533.
MLA Yang, T,et al."Reconstructing the interaction between dark energy and dark matter using Gaussian processes".PHYSICAL REVIEW D 91.12(2015):123533.
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