ITP OpenIR  > 理论物理所2012年知识产出
Observational constraints on cosmic neutrinos and dark energy revisited
Wang, X; Meng, XL; Zhang, TJ; Shan, HY; Gong, Y; Tao, C; Chen, XL; Huang, YF; Wang, X (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.
2012
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
期号11
摘要Using several cosmological observations, i.e. the cosmic microwave background anisotropies (WMAP), the weak gravitational lensing (CFHTLS), the measurements of baryon acoustic oscillations (SDSS+WiggleZ), the most recent observational Hubble parameter data, the Union2.1 compilation of type Ia supernovae, and the HST prior, we impose constraints on the sum of neutrino masses (Sigma m(v)), the effective number of neutrino species (N-eff) and dark energy equation of state (w), individually and collectively. We find that a tight upper limit on Sigma m(v) can be extracted from the full data combination, if N-eff and w are fixed. However this upper bound is severely weakened if N-eff and w are allowed to vary. This result naturally raises questions on the robustness of previous strict upper bounds on Sigma m(v), ever reported in the literature. The best-fit values from our most generalized constraint read Sigma m(v) = 0.556(-0.288)(+0.231) eV, N-eff = 3.839 +/- 0.452, and w = -1.058 +/- 0.088 at 68% confidence level, which shows a firm lower limit on total neutrino mass, favors an extra light degree of freedom, and supports the cosmological constant model. The current weak lensing data are already helpful in constraining cosmological model parameters for fixed w. The dataset of Hubble parameter gains numerous advantages over supernovae when w = -1, particularly its illuminating power in constraining N-eff. As long as w is included as a free parameter, it is still the standardizable candles of type Ia supernovae that play the most dominant role in the parameter constraints.
部门归属[Wang, Xin; Meng, Xiao-Lei; Zhang, Tong-Jie] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China; [Wang, Xin; Huang, Y. F.] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China; [Meng, Xiao-Lei; Chen, Xuelei] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China; [Zhang, Tong-Jie] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China; [Shan, HuanYuan; Tao, Charling] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China; [Shan, HuanYuan; Tao, Charling] Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China; [Shan, HuanYuan; Tao, Charling] CNRS, IN2P3 Luminy, Ctr Phys Particules Marseille, F-13288 Marseille 9, France; [Shan, HuanYuan; Tao, Charling] Univ Aix Marseille 2, F-13288 Marseille 9, France; [Gong, Yan] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
关键词Matter Power Spectrum Hubble-space-telescope Weak-lensing Surveys Observations Cosmological Interpretation Baryon Acoustic-oscillations Probe Wmap Observations Luminous Red Galaxies Large-scale Structure Equation-of-state Massive Neutrinos
学科领域Physics
资助者NASA Office of Space Science; National Science Foundation of China [11173006]; Ministry of Science and Technology National Basic Science program (project 973) [2012CB821804]; Fundamental Research Funds for the Central Universities; Natural Science Foundation of China [11033002]; National Basic Research Program of China (973 Program) [2009CB824800] ; NASA Office of Space Science; National Science Foundation of China [11173006]; Ministry of Science and Technology National Basic Science program (project 973) [2012CB821804]; Fundamental Research Funds for the Central Universities; Natural Science Foundation of China [11033002]; National Basic Research Program of China (973 Program) [2009CB824800] ; NASA Office of Space Science; National Science Foundation of China [11173006]; Ministry of Science and Technology National Basic Science program (project 973) [2012CB821804]; Fundamental Research Funds for the Central Universities; Natural Science Foundation of China [11033002]; National Basic Research Program of China (973 Program) [2009CB824800] ; NASA Office of Space Science; National Science Foundation of China [11173006]; Ministry of Science and Technology National Basic Science program (project 973) [2012CB821804]; Fundamental Research Funds for the Central Universities; Natural Science Foundation of China [11033002]; National Basic Research Program of China (973 Program) [2009CB824800]
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收录类别SCI
语种英语
资助者NASA Office of Space Science; National Science Foundation of China [11173006]; Ministry of Science and Technology National Basic Science program (project 973) [2012CB821804]; Fundamental Research Funds for the Central Universities; Natural Science Foundation of China [11033002]; National Basic Research Program of China (973 Program) [2009CB824800] ; NASA Office of Space Science; National Science Foundation of China [11173006]; Ministry of Science and Technology National Basic Science program (project 973) [2012CB821804]; Fundamental Research Funds for the Central Universities; Natural Science Foundation of China [11033002]; National Basic Research Program of China (973 Program) [2009CB824800] ; NASA Office of Space Science; National Science Foundation of China [11173006]; Ministry of Science and Technology National Basic Science program (project 973) [2012CB821804]; Fundamental Research Funds for the Central Universities; Natural Science Foundation of China [11033002]; National Basic Research Program of China (973 Program) [2009CB824800] ; NASA Office of Space Science; National Science Foundation of China [11173006]; Ministry of Science and Technology National Basic Science program (project 973) [2012CB821804]; Fundamental Research Funds for the Central Universities; Natural Science Foundation of China [11033002]; National Basic Research Program of China (973 Program) [2009CB824800]
WOS记录号WOS:000310833100018
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15002
专题理论物理所2012年知识产出
通讯作者Wang, X (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.
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GB/T 7714
Wang, X,Meng, XL,Zhang, TJ,et al. Observational constraints on cosmic neutrinos and dark energy revisited[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(11).
APA Wang, X.,Meng, XL.,Zhang, TJ.,Shan, HY.,Gong, Y.,...&Wang, X .(2012).Observational constraints on cosmic neutrinos and dark energy revisited.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(11).
MLA Wang, X,et al."Observational constraints on cosmic neutrinos and dark energy revisited".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .11(2012).
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