Constraints on cosmological models from Hubble parameters measurements

doi:10.1142/S0218271814500515

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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); Li SY(李思宇)
	2014
发表期刊	INTERNATIONAL JOURNAL OF MODERN PHYSICS D
卷号	23 期号:5 页码:1450051
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.
关键词	Measurements of Hubble parameters neutrino
学科领域	Astronomy & Astrophysics
DOI	10.1142/S0218271814500515
收录类别	SCI
WOS记录号	WOS:000335515400013
引用统计	被引频次：5[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	粒子天体物理中心理论物理室
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.

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