Results 111 to 120 of about 706,236 (203)

Resource Letter: Gravitational Lensing

, 2012
This Resource Letter provides a guide to a selection of the literature on gravitational lensing and its applications. Journal articles, books, popular articles, and websites are cited for the following topics: foundations of gravitational lensing ...
Philip J. Marshall, Tommaso Treu, Douglas Clowe, Clowe, D, Treu, T, Marshall, Philip, Marshall, PJ   +6 more
core   +1 more source

Modeling the Impacts of Galaxy Intrinsic Alignments on Weak Lensing Peak Statistics

The Astrophysical Journal
Weak gravitational lensing (WL) peak statistics capture cosmic nonlinear structures and can provide additional cosmological information complementary to cosmic shear two-point correlation analyses.
Tianyu Zhang, Xiangkun Liu, Ziwei Li, Chengliang Wei, Guoliang Li, Yu Luo, Xi Kang, Zuhui Fan   +7 more
doaj   +1 more source

FLAMINGO: calibrating large cosmological hydrodynamical simulations with machine learning. [PDF]

Mon Not R Astron Soc, 2023
Kugel R, Schaye J, Schaller M, Helly JC, Braspenning J, Elbers W, Frenk CS, McCarthy IG, Kwan J, Salcido J, van Daalen MP, Vandenbroucke B, Bahé YM, Borrow J, Chaikin E, Huško F, Jenkins A, Lacey CG, Nobels FSJ, Vernon I.   +19 more
europepmc   +1 more source

D4CNN×AnaCal: Physics-informed Machine Learning for Accurate and Precise Weak-lensing Shear Estimation

The Astrophysical Journal
Traditional weak-gravitational-lensing shear estimators are carefully calibrated but struggle to fully capture realistic galaxy morphologies, point-spread-function (PSF) effects, blending, and noise in deep surveys, while blindly trained machine learning
Shurui Lin, Xiangchong Li, Ji Li, Shengcao Cao, Xin Liu, Yu-Xiong Wang   +5 more
doaj   +1 more source

A New Method for PSF correction using the Ellipticity of Re-smeared Artificial Images in Weak Gravitational Lensing Shear Analysis

, 2014
We propose a new method for Point Spread Function (PSF) correction in weak gravitational lensing shear analysis using an artificial image with the same ellipticity as the lensed image. This avoids the systematic error associated with the approximation in PSF correction used in previous approaches.
Okura, Yuki, Futamase, Toshifumi
openaire   +2 more sources

Generation of realistic input parameters for simulating atmospheric point-spread functions at astronomical observatories

The Open Journal of Astrophysics
High-fidelity simulated astronomical images are an important tool in developing and measuring the performance of image-processing algorithms, particularly for high precision measurements of cosmic shear -- correlated distortions of images of distant ...
Claire-Alice Hébert, Joshua E. Meyers, My H. Do, Patricia R. Burchat, LSST Dark Energy Science Collaboration   +4 more
doaj   +1 more source

Weak gravitational lensing measurements of Abell 2744 using JWST and shear measurement algorithm pyRRG-JWST

Monthly Notices of the Royal Astronomical Society
ABSTRACT We update the publicly available weak lensing shear measurement algorithm pyRRG for the JWST, and apply it to UNCOVER DR1 imaging of galaxy cluster Abell 2744. At short wavelengths (${\lt}2.5\, \mu$m), shear measurements are consistent between independent observations through different JWST bandpasses, and calibrated within 1.5 ...
David R Harvey, Richard Massey
openaire   +3 more sources

KiDS-1000 catalogue: Weak gravitational lensing shear measurements

, 2020
We present weak lensing shear catalogues from the fourth data release of the Kilo-Degree Survey, KiDS-1000, spanning 1006 square degrees of deep and high-resolution imaging.
Getman, F, Giblin, B, Kannawadi, A, Tröster, T, Bilicki, M, Hoekstra, H, Miller, L, Luca van den Busch, J, Asgari, M, Napolitano, N R, Joachimi, B, Schneider, P, de Jong, J, Lin, C, Valentijn, E, Dvornik, A, Erben, T, Blake, C, Hildebrandt, H, Heymans, C, Shan, H Y, Kuijken, K, Wright, A H   +22 more
core  

Galaxy–Galaxy Lensing Data: f(T) Gravity Challenges General Relativity

The Astrophysical Journal
We use galaxy–galaxy lensing data to test general relativity and f ( T ) gravity at galaxy scales. We consider an exact spherically symmetric solution of f ( T ) theory, which is obtained from an approximate quadratic correction, and thus it is expected ...
Qingqing Wang, Xin Ren, Bo Wang, Yi-Fu Cai, Wentao Luo, Emmanuel N. Saridakis   +5 more
doaj   +1 more source

Encoding Collective Knowledge, Instructing Data Reusers: The Collaborative Fixation of a Digital Scientific Data Set. [PDF]

Comput Support Coop Work, 2021
Hoeppe G.
europepmc   +1 more source