115 citations · 800 across the 38 of their papers we have counts for
20 papers · 1 filter
Microlensing bias on the detection of strong lensing gravitational wave
Xikai Shan, Xuechun Chen, Bin Hu +1
Identifying strong lensing gravitational wave (SLGW) events is of utmost importance in astrophysics as we approach the historic first detection of SLGW amidst the growing number of…
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…
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…
Wave effect of gravitational waves intersected with a microlens field: a new algorithm and supplementary study
Xikai Shan, Guoliang Li, Xuechun Chen +2
The increase in gravitational wave (GW) events has allowed receiving strong lensing image pairs of GWs. However, the wave effect (diffraction and interference) due to the microlens…
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…
Forecast of observing time delay of the strongly lensed quasars with Muztagh-Ata 1.93m telescope
Shanhao Zhu, Yiping Shu, Haibo Yuan +8
As a completely independent method, the measurement of time delay of strongly lensed quasars (TDSL) are crucial to resolve the Hubble tension. Extensive monitoring is required but…
About One-point Statistics of the Ratio of Two Fourier-transformed Cosmic Fields and an Application
Ming Li, Jun Pan, Pengjie Zhang +7
The Fourier transformation is an effective and efficient operation of Gaussianization at the one-point level. Using a set of N-body simulation data, we verified that the one-point…
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…
Testing Shear Recovery with Field Distortion
Jun Zhang, Fuyu Dong, Hekun Li +7
The tilt, rotation, or offset of each CCD with respect to the focal plane, as well as the distortion of the focal plane itself, cause shape distortions to the observed objects, an…
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…
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…
Removing the Impact of Correlated PSF Uncertainties in Weak Lensing
Tianhuan Lu, Jun Zhang, Fuyu Dong +5
Accurate reconstruction of the spatial distributions of the Point Spread Function (PSF) is crucial for high precision cosmic shear measurements. Nevertheless, current methods are n…
Testing PSF Interpolation In Weak Lensing With Real Data
Tianhuan Lu, Jun Zhang, Fuyu Dong +5
Reconstruction of the point spread function (PSF) is a critical process in weak lensing measurement. We develop a real-data based and galaxy-oriented pipeline to compare the perfor…
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…
Gravitational lensing effects on sub-millimetre galaxy counts
Xinzhong Er, Guoliang Li, Shude Mao +1
We study the effects on the number counts of sub-millimetre galaxies due to gravitational lensing. We explore the effects on the magnification cross section due to halo density pro…
Large Synoptic Survey Telescope: Dark Energy Science Collaboration
LSST Dark Energy Science Collaboration
This white paper describes the LSST Dark Energy Science Collaboration (DESC), whose goal is the study of dark energy and related topics in fundamental physics with data from the La…
Fast Shape Estimation for Galaxies and Stars
Guoliang Li, Bo Xin, Wei Cui
Model fitting is frequently used to determine the shape of galaxies and the point spread function, for examples, in weak lensing analyses or morphology studies aiming at probing th…
Mass reconstruction by gravitational shear and flexion
Xinzhong Er, Guoliang Li, Peter Schneider
Galaxy clusters are considered as excellent probes for cosmology. For that purpose, their mass needs to be measured and their structural properties needs to be understood. We propo…
Impacts of Source Properties on Strong Lensing by Rich Galaxy Clusters
G. J. Gao, Y. P. Jing, S. Mao +2
We use a high-resolution -body simulation to investigate the influence of background galaxy properties, including redshift, size, shape and clustering, on the efficiency of form…
Effects of Dark Matter Substructures on Gravitational Lensing: Results from the Aquarius Simulations
D. D. Xu, S. Mao, J. Wang +7
We use high-resolution Aquarius simulations of Milky Way-sized haloes in the LCDM cosmology to study the effects of dark matter substructures on gravitational lensing. Each halo is…