58 citations · 157 across the 9 of their papers we have counts for
4 papers · 1 filter
The reconstruction of dark energy with Ridge Regression Approach
Long Huang, Xiaofeng Yang, Xiang Liu
It may be determined by non-parametric method if the dark energy evolves with time. We propose a method of combining PCA and biased estimation on the basis of ridge regression anal…
Searching for a preferred direction with Union2.1 data
Xiaofeng Yang, F. Y. Wang, Zhe Chu
A cosmological preferred direction was reported from the type Ia supernovae (SNe Ia) data in recent years. We use the Union2.1 data to give a simple classification of such studies…
Analytical Solutions of Singular Isothermal Quadrupole Lens
Zhe Chu, W. P. Lin, Xiaofeng Yang
Using analytical method, we study the Singular Isothermal Quadrupole (SIQ) lens system, which is the simplest lens model that can produce four images. In this case, the radial mass…
The optimal weighting function for cosmic magnification measurement through foreground galaxy-background galaxy (quasar) cross correlation
Xiaofeng Yang, Pengjie Zhang
Cosmic magnification has been detected through cross correlation between foreground and background populations (galaxies or quasars). It has been shown that weighing each backgroun…