Impacts on cosmological constraints from degeneracies
Li H(李虹); Xia JQ(夏俊卿); Li, H; Xia, JQ
刊名JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2012
期号11页码:39
关键词dark energy experiments cosmological parameters from CMBR
学科分类Astronomy & Astrophysics; Physics
DOI10.1088/1475-7516/2012/11/039
英文摘要In this paper, we study the degeneracies among several cosmological parameters in detail and discuss their impacts on the determinations of these parameters from the current and future observations. By combining the latest data sets, including type-I a supernovae "Union2.1" compilation, WMAP seven-year data and the baryon acoustic oscillations from the SDSS Data Release Seven, we perform a global analysis to determine the cosmological parameters, such as the equation of state of dark energy w, the curvature of the universe Omega(k), the total neutrino mass Sigma m(v), and the parameters associated with the power spectrum of primordial fluctuations (n(s), alpha(s) and r). We pay particular attention on the degeneracies among these parameters and the influences on their constraints, by with or without including these degeneracies, respectively. We find that w and Omega(k) or Sigma m(v) are strongly correlated. Including the degeneracies will significantly weaken the constraints. Furthermore, we study the capabilities of future observations and find these degeneracies can be broken very well. Consequently, the constraints of cosmological parameters can be improved dramatically.
收录类别SCI
WOS记录号WOS:000312263500022
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被引频次:4[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/311005/224396
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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Li H,Xia JQ,Li, H,et al. Impacts on cosmological constraints from degeneracies[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(11):39.
APA 李虹,夏俊卿,Li, H,&Xia, JQ.(2012).Impacts on cosmological constraints from degeneracies.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(11),39.
MLA 李虹,et al."Impacts on cosmological constraints from degeneracies".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .11(2012):39.
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