Constraints on cosmological models from Hubble parameters measurements

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	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)
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
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.
学科主题	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000335515400013
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225046]
专题	高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	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.