Constraints on cosmological models from Hubble parameters measurements
Zheng W(郑伟); Li H(李虹); Xia JQ(夏俊卿); Zheng, W; Li, H; Xia, JQ; Wan, YP; Li, SY; Li, MZ;; Wan YP(万友平); Li SY(李思宇)
刊名INTERNATIONAL JOURNAL OF MODERN PHYSICS D
2014
卷号23期号:5页码:1450051
关键词Measurements of Hubble parameters neutrino
学科分类Astronomy & Astrophysics
DOI10.1142/S0218271814500515
英文摘要In this paper, we study the cosmological constraints from the measurements of Hubble parameters - H(z) data. Here, we consider two kinds of H(z) data: the direct H-0 probe from the Hubble Space Telescope (HST) observations of Cepheid variables with H-0 = 73.8 +/- 2.4 km s(-1) Mpc(-1) and several measurements on the Hubble parameter at high redshifts H(z). Employing Markov Chain Monte Carlo (MCMC) method, we also combine the WMAP nine-year data (WMAP9), the baryon acoustic oscillations (BAO) and type Ia supernovae (SNIa) Union2.1 compilation to determine the cosmological parameters, such as the equation of state (EoS) of dark energy w, the curvature of the universe Omega(k), the total neutrino mass Sigma m(nu), the effective number of neutrinos N-eff and the parameters associated with the power spectrum of primordial fluctuations. These H(z) data provide extra information on the accelerate rate of our universe at high redshifts. Therefore, adding these H(z) data significantly improves the constraints on cosmological parameters, such as the number of relativistic species. Moreover, we find that direct prior on H-0 from HST can also give good constraints on some parameters, due to the degeneracies between these parameters and H-0.
收录类别SCI
WOS记录号WOS:000335515400013
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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/311005/225046
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
中国科学院高能物理研究所_理论物理室
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Zheng W,Li H,Xia JQ,et al. Constraints on cosmological models from Hubble parameters measurements[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS D,2014,23(5):1450051.
APA 郑伟.,李虹.,夏俊卿.,Zheng, W.,Li, H.,...&李思宇.(2014).Constraints on cosmological models from Hubble parameters measurements.INTERNATIONAL JOURNAL OF MODERN PHYSICS D,23(5),1450051.
MLA 郑伟,et al."Constraints on cosmological models from Hubble parameters measurements".INTERNATIONAL JOURNAL OF MODERN PHYSICS D 23.5(2014):1450051.
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