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题名: Testing coupled dark energy with large scale structure observation
作者: Yang, WQ ;  Xu, LX
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2014
期号: 8, 页码:34
关键词: SUPERNOVA LEGACY SURVEY ;  BARYON ACOUSTIC-OSCILLATIONS ;  INTERACTING QUINTESSENCE ;  COSMIC STRUCTURE ;  GROWTH-RATE ;  CONSTRAINTS ;  MODELS ;  MATTER ;  PERTURBATIONS ;  GALAXIES
学科分类: Physics
DOI: 10.1088/1475-7516/2014/08/034
通讯作者: Yang, WQ (reprint author), Dalian Univ Technol, Sch Phys & Optoelect Technol, Inst Theoret Phys, Dalian 116024, Peoples R China.
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
英文摘要: The coupling between the dark components provides a new approach to mitigate the coincidence problem of 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 (Q) over bar = 3H xi(x)(rho) over bar (x). In the frame of dark energy, we derive the evolution equations for the density and velocity perturbations. According to the Markov Chain Monte Carlo method, we constrain the model by currently available cosmic observations which include cosmic microwave background radiation, baryon acoustic oscillation, type Ia supernovae, and f sigma(8)(z) data points from redshift-space distortion. The results show the interaction rate in 3 sigma regions: xi(x) = 0.00328(-0.00328-0.00328-0.00328)(+0.000736+0.00549+0.00816), which means that the recently cosmic observations favor a small interaction rate which is up to the order of 10(-2), meanwhile, the measurement of redshift-space distortion could rule out the large interaction rate in the 1 sigma region.
资助者: NSFC [11275035]; Fundamental Research Funds for the Central Universities [DUT13LK01]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000341848800034
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15690
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Yang, WQ,Xu, LX. Testing coupled dark energy with large scale structure observation[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2014(8):34.
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