58 citations · 85 across the 6 of their papers we have counts for
6 papers
The Magnification Invariant of Circularly-symmetric Lens Models
Chengliang Wei, Zhe Chu, Yiping Shu
In the context of strong gravitational lensing, the magnification of image is of crucial importance to constrain various lens models. For several commonly used quadruple lens model…
Magnification relations of quad lenses and applications on Einstein crosses
Zhe Chu, G. L. Li, W. P. Lin +1
In this work, we mainly study the magnification relations of quad lens models for cusp, fold and cross configurations. By dividing and ray-tracing in different image regions, we nu…
Cusp Summations and Cusp Relations of Simple Quad Lenses
Zhe Chu, G. L. Li, W. P. Lin
We review five often used quad lens models, each of which has analytical solutions and can produce four images at most. Each lens model has two parameters, including one that descr…
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…
Multipole Gravitational Lensing and High-order Perturbations on the Quadrupole Lens
Z. Chu, W. P. Lin, G. L. Li +1
An arbitrary surface mass density of gravitational lens can be decomposed into multipole components. We simulate the ray-tracing for the multipolar mass distribution of generalized…