12 citations · 27 across the 12 of their papers we have counts for
12 papers
AKRA 3.0: A matrix-free Inversion Framework for Weak Lensing Mass Mapping and Its Application to DES Y3 Data
Yuan Shi, Pengjie Zhang, Li Cui +2
Weak gravitational lensing mass mapping offers a direct probe of the matter distribution. Accurate reconstruction of mass maps from masked shear catalogs remains challenging due to…
The first AKRA mass map reconstruction from HSC Y1 data
Yuan Shi, Pengjie Zhang, Zhao Chen +4
Weak lensing mass-mapping from shear catalogs faces systematic challenges from survey masks and spatially varying noise. To overcome these issues and reconstruct unbiased convergen…
Proposal to construct the dark-matter-only counterpart of the observed universe combining weak lensing and baryon censuses
Shuren Zhou, Pengjie Zhang
Baryonic effects such as AGN feedback can significantly impact the matter clustering, are harder to model from first principles, and emerge as a severe limiting factor in weak lens…
Cavendish experiment with fast radio bursts on cosmological scales
Shuren Zhou, Pengjie Zhang
A key measure of gravity is the relation between the Weyl potential and the matter overdensity , encapsulated as an effective gravitational constant for…
Meta-Calibration of the Cosmic Magnification Coefficient: Toward Unbiased Weak Lensing Reconstruction by Counting Galaxies
Jian Qin, Pengjie Zhang, Zhu Chen +6
Weak lensing alters galaxy sizes and fluxes, influencing the clustering patterns of galaxies through cosmic magnification. This effect enables the reconstruction of weak lensing co…
The direct measurement of gravitational potential decay rate at cosmological scales II -- Improved dark energy constraint from
Fuyu Dong, Pengjie Zhang, Haojie Xu +1
The gravitational potential decay rate (DR) is caused by the cosmic acceleration of the universe, providing a direct probe into the existence of dark energy (DE). We present measur…
AKRA 2.0: Accurate Kappa Reconstruction Algorithm for masked shear catalog
Yuan Shi, Pengjie Zhang, Furen Deng +4
Cosmic shear surveys serve as a powerful tool for mapping the underlying matter density field, including non-visible dark matter. A key challenge in cosmic shear surveys is the acc…
Challenges in Cosmic Magnification Reconstruction by Magnification Response
Shuren Zhou, Pengjie Zhang
Cosmic magnification on the observed galaxy overdensity is a promising weak gravitational lensing tracer. Current cosmic magnification reconstruction algorithms, ABS (Analytical me…
Parameterization of Stochasticity in Galaxy Clustering and Reconstruction of Tomographic Matter Clustering
Shuren Zhou, Pengjie Zhang
The stochasticity in galaxy clustering, the mismatch between galaxy and underlying matter distribution, suppresses the matter clustering amplitude reconstructed by the combination…
Enhancing Morphological Measurements of Cosmic Web with Delaunay Tessellation Field Estimation
Yu Liu, Yu Yu, Pengjie Zhang +1
The density fields constructed by traditional mass assignment methods are susceptible to irritating discreteness, which hinders morphological measurements of cosmic large-scale str…
Accurate Kappa Reconstruction Algorithm for masked shear catalog (AKRA)
Yuan Shi, Pengjie Zhang, Zeyang Sun +1
Weak gravitational lensing is an invaluable tool for understanding fundamental cosmological physics. An unresolved issue in weak lensing cosmology is to accurately reconstruct the…
Principal Component Analysis of Galaxy Clustering in Hyperspace of Galaxy Properties
Shuren Zhou, Pengjie Zhang, Ziyang Chen
Ongoing and upcoming galaxy surveys are providing precision measurements of galaxy clustering. However a major obstacle in its cosmological application is the stochasticity in the…