ITP OpenIR  > 理论物理所2014年知识产出
Coupled dark energy with perturbed Hubble expansion rate
Yang, WQ; Xu, LX; Yang, WQ (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China.
2014
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号90期号:8页码:83532
摘要The coupling between dark sectors provides a possible approach to mitigate the coincidence problem of the cosmological standard model. In this paper, dark energy is treated as a fluid with a constant equation of state, whose coupling with dark matter is proportional the Hubble parameter and energy density of dark energy, that is, (Q) over bar = 3 xi(x)(H) over bar(rho) over bar (x). In particular, we consider the Hubble expansion rate to be perturbed in the perturbation evolutions of dark sectors. Using joint data sets which include cosmic microwave background radiation, baryon acoustic oscillation, type Ia supernovae, and redshift-space distortions, we perform a full Markov chain Monte Carlo likelihood analysis for the coupled model. The results show that the mean value with errors of the interaction rate is xi(x) = 0.00305(-0.00305-0.00305-0.00305)(+0.000645+0.00511+0.00854) for Q(A)(mu)parallel to u(c)(mu) and xi(x) = 0.00317(-0.00317-0.00317-0.00317)(+0.000628+0.00547+0.00929) for Q(A)(mu)parallel to u(x)(mu), which means that the recent cosmic observations favor a small interaction rate which is up to the order of 10(-3). Moreover, in contrast to the coupled model with an unperturbed expansion rate, we find the perturbed Hubble expansion rate can bring about a negligible impact on the model parameter space.
部门归属[Yang, Weiqiang ; Xu, Lixin] Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China ; [Xu, Lixin] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
关键词Oscillation Spectroscopic Survey Baryon Acoustic-oscillations Interacting Quintessence Redshift-space Growth-rate Models Matter Constraints Galaxies Perturbations
学科领域Physics
资助者NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01] ; NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01] ; NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01] ; NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01]
DOI10.1103/PhysRevD.90.083532
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收录类别SCI
语种英语
资助者NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01] ; NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01] ; NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01] ; NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01]
WOS记录号WOS:000350215700001
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被引频次:18[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15599
专题理论物理所2014年知识产出
通讯作者Yang, WQ (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China.
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GB/T 7714
Yang, WQ,Xu, LX,Yang, WQ . Coupled dark energy with perturbed Hubble expansion rate[J]. PHYSICAL REVIEW D,2014,90(8):83532.
APA Yang, WQ,Xu, LX,&Yang, WQ .(2014).Coupled dark energy with perturbed Hubble expansion rate.PHYSICAL REVIEW D,90(8),83532.
MLA Yang, WQ,et al."Coupled dark energy with perturbed Hubble expansion rate".PHYSICAL REVIEW D 90.8(2014):83532.
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