119 citations · 1.7k across the 55 of their papers we have counts for
6 papers · 1 filter
Is the Universe Transparent?
Kai Liao, A. Avgoustidis, Zhengxiang Li
We present our study on cosmic opacity, which relates to changes in photon number as photons travel from the source to the observer. Cosmic opacity may be caused by absorption/scat…
The Distance Duality Relation from Strong Gravitational Lensing
Kai Liao, Zhengxiang Li, Shuo Cao +3
Under very general assumptions of metric theory of spacetime, photons traveling along null geodesics and photon number conservation, two observable concepts of cosmic distance, i.e…
Unbiased constraints on the clumpiness of universe from standard candles
Zhengxiang Li, Xuheng Ding, Zong-Hong Zhu
We perform unbiased tests for the clumpiness of universe by confronting the Zel'dovich-Kantowski-Dyer-Roeder luminosity distance which describes the effect of local inhomogeneities…
Is there evidence for dark energy evolution?
Xuheng Ding, Marek Biesiada, Shuo Cao +2
Recently, Sahni, Shafielo o & Starobinsky (2014) combined two independent measurements of from BAO data with the value of the Hubble constant , in order to tes…
Constructing a cosmological model-independent Hubble diagram of type Ia supernovae with cosmic chronometers
Zhengxiang Li, J. E. Gonzalez, Hongwei Yu +2
We apply two methods, namely the Gaussian processes and the non-parametric smoothing procedure, to reconstruct the Hubble parameter as a function of redshift from 15 measure…
Determining using a model-independent method
Puxun Wu, Zhengxiang Li, Hongwei Yu
By using type Ia supernovae (SNIa) to provide the luminosity distance (LD) directly, which depends on the value of the Hubble constant ,…