75 citations · 233 across the 15 of their papers we have counts for
9 papers · 1 filter
The chromatic Point Spread Function of weak lensing measurement in Chinese Space Station survey Telescope
Q. Y. Liu, X. Z. Er, Z. H. Fan +6
The weak gravitational lensing is a powerful tool in modern cosmology. To accurately measure the weak lensing signal, one has to control the systematic bias to a small level. One o…
CSST WL preparation I: forecast the impact from non-Gaussian covariances and requirements on systematics-control
Ji Yao, Huanyuan Shan, Ran Li +11
The precise estimation of the statistical errors and accurate removal of the systematical errors are the two major challenges for the stage IV cosmic shear surveys. We explore thei…
Effects of galaxy intrinsic alignment on weak lensing peak statistics
Tianyu Zhang, Xiangkun Liu, Chengliang Wei +4
The galaxy intrinsic alignment (IA) is a dominant source of systematics in weak lensing (WL) studies. In this paper, by employing large simulations with semi-analytical galaxy form…
Tolerance For the Pixelation Effect in Shear Measurement
Zhi Shen, Jun Zhang, Hekun Li +6
Images taken by space telescopes typically have a superb spatial resolution, but a relatively poor sampling rate due to the finite CCD pixel size. Beyond the Nyquist limit, it beco…
Detection of Cosmic Magnification via Galaxy Shear -- Galaxy Number Density Correlation from HSC Survey Data
Xiangkun Liu, Dezi Liu, Zucheng Gao +5
We propose a novel method to detect cosmic magnification signals by cross-correlating foreground convergence fields constructed from galaxy shear measurements with background galax…
Lensing magnification: gravitational waves from coalescing stellar-mass binary black holes
Xikai Shan, Chengliang Wei, Bin Hu
Gravitational waves (GWs) may be magnified or de-magnified due to lensing. This phenomenon will bias the distance estimation based on the matched filtering technique. Via the multi…
The Correspondence between Convergence Peaks from Weak Lensing and Massive Dark Matter Haloes
Chengliang Wei, Guoliang Li, Xi Kang +4
The convergence peaks, constructed from galaxy shape measurement in weak lensing, is a powerful probe of cosmology as the peaks can be connected with the underlined dark matter hal…
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…
Full-sky ray-tracing simulation of weak lensing using ELUCID simulations: exploring galaxy intrinsic alignment and cosmic shear correlations
Chengliang Wei, Guoliang Li, Xi Kang +15
The intrinsic alignment of galaxies is an important systematic effect in weak-lensing surveys, which can affect the derived cosmological parameters. One direct way to distinguish d…