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New limits on coupled dark energy from Planck
Xia JQ(夏俊卿); Xia, JQ
2013
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
期号11页码:22
摘要Recently, the Planck collaboration has released the first cosmological papers providing the high resolution, full sky, maps of the cosmic microwave background (CMB) temperature anisotropies. It is crucial to understand that whether the accelerating expansion of our universe at present is driven by an unknown energy component (Dark Energy) or a modification to general relativity (Modified Gravity). In this paper we study the coupled dark energy models, in which the quintessence scalar field nontrivially couples to the cold dark matter, with the strength parameter of interaction beta. Using the Planck data alone, we obtain that the strength of interaction between dark sectors is constrained as beta < 0.102 at 95% confidence level, which is tighter than that from the WMAP9 data alone. Combining the Planck data with other probes, like the Baryon Acoustic Oscillation (BAO), Type-Ia supernovae "Union2.1 compilation" and the CMB lensing data from Planck measurement, we find the tight constraint on the strength of interaction beta < 0.052 (95% C.L.). Interestingly, we also find a non-zero coupling beta = 0.078 +/- 0.022 (68% C.L.) when we use the Planck, the "SNLS" supernovae samples, and the prior on the Hubble constant from the Hubble Space Telescope (HST) together. This evidence for the coupled dark energy models mainly comes from a tension between constraints on the Hubble constant from the Planck measurement and the local direct H-o probes from HST.
关键词modified gravity cosmological parameters from CMBR dark energy theory
学科领域Astronomy & Astrophysics; Physics
DOI10.1088/1475-7516/2013/11/022
收录类别SCI
WOS记录号WOS:000327843900023
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被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224387
专题粒子天体物理中心
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GB/T 7714
Xia JQ,Xia, JQ. New limits on coupled dark energy from Planck[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2013(11):22.
APA 夏俊卿,&Xia, JQ.(2013).New limits on coupled dark energy from Planck.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(11),22.
MLA 夏俊卿,et al."New limits on coupled dark energy from Planck".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .11(2013):22.
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