Beijing Normal University

output

19932026

Showing 2014 · astro-ph.COShow all

4 papers · 2 filters

astro-ph.CO2014★ 43 cited

Cosmic equation of state from combined angular diameter distances: Does the tension with luminosity distances exist?

Shuo Cao, Zong-Hong Zhu

Using a relatively complete observational data concerning four angular diameter distance (ADD) measurements and %synthetic combined SN+GRB observations representing current luminos…

astro-ph.CO2014★ 19 cited

Constraints on the exponential $f (R)$ model from latest Hubble parameter measurements

Yun Chen, Chao-Qiang Geng, Chung-Chi Lee +2

We investigate the viable exponential $f (R)$ gravity in the metric formalism with $f (R) = - β R_{s} (1 - e^{- R / R_{s}})$ . The latest sample of the Hubble parameter measurements with 23 data p…

astro-ph.CO2014

Fluctuation of the Hubble parameter

Xi-Bin Li, Hao-Feng Qin, Zhi-Song Zhang +1

We study the Hubble parameter $H (z)$ in perturbed Friedmann universe and obtain an expression of the perturbed Hubble parameter $H (z, n)$ . We derive the Hubble parameter po…

astro-ph.CO2014★ 49 cited

Model-independent determination of curvature parameter by using $H (z)$ and $D_{A} (z)$ data pair from BAO measurement

Yun-Long Li, Shi-Yu Li, Tong-Jie Zhang +1

We present a model-independent determination of the curvature parameter $Ω_{k}$ by using the Hubble parameter $H (z)$ and angular diameter distance $D_{A} (z)$ from the recent baryon aco…

Cosmic equation of state from combined angular diameter distances: Does the tension with luminosity distances exist?

Constraints on the exponential f(R) model from latest Hubble parameter measurements

Fluctuation of the Hubble parameter

Model-independent determination of curvature parameter by using H(z) and DA​(z) data pair from BAO measurement

Constraints on the exponential $f (R)$ model from latest Hubble parameter measurements

Model-independent determination of curvature parameter by using $H (z)$ and $D_{A} (z)$ data pair from BAO measurement