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- W3100330232 abstract "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 $H_0=73.8pm2.4$ ${rm km,s^{-1},Mpc^{-1}}$ and several measurements on the Hubble parameter at high redshifts $H(z)$. Employing Markov Chain Monte Carlo 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 $sum{m_nu}$, the effective number of neutrinos $N_{rm eff}$, 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 $H_0$." @default.
- W3100330232 created "2020-11-23" @default.
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- W3100330232 date "2014-04-30" @default.
- W3100330232 modified "2023-10-16" @default.
- W3100330232 title "Constraints on cosmological models from Hubble parameters measurements" @default.
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- W3100330232 doi "https://doi.org/10.1142/s0218271814500515" @default.
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