71 citations · 733 across the 25 of their papers we have counts for
22 papers · 1 filter
Euclid preparation. LIII. LensMC, weak lensing cosmic shear measurement with forward modelling and Markov Chain Monte Carlo sampling
Euclid Collaboration, G. Congedo, L. Miller +239
LensMC is a weak lensing shear measurement method developed for Euclid and Stage-IV surveys. It is based on forward modelling in order to deal with convolution by a point spread fu…
Euclid preparation. XLII. A unified catalogue-level reanalysis of weak lensing by galaxy clusters in five imaging surveys
Euclid Collaboration, M. Sereno, S. Farrens +221
Precise and accurate mass calibration is required to exploit galaxy clusters as astrophysical and cosmological probes in the Euclid era. Systematic errors in lensing signals by gal…
Euclid preparation: XXVIII. Modelling of the weak lensing angular power spectrum
Euclid Collaboration, A. C. Deshpande, T. Kitching +200
This work considers which higher-order effects in modelling the cosmic shear angular power spectra must be taken into account for Euclid. We identify which terms are of concern, an…
JAX-COSMO: An End-to-End Differentiable and GPU Accelerated Cosmology Library
Jean-Eric Campagne, François Lanusse, Joe Zuntz +7
We present jax-cosmo, a library for automatically differentiable cosmological theory calculations. It uses the JAX library, which has created a new coding ecosystem, especially in…
Euclid preparation. XXXII. Evaluating the weak lensing cluster mass biases using the Three Hundred Project hydrodynamical simulations
Euclid Collaboration, C. Giocoli, M. Meneghetti +213
The photometric catalogue of galaxy clusters extracted from ESA Euclid data is expected to be very competitive for cosmological studies. Using state-of-the-art hydrodynamical simul…
Euclid Preparation. XXVIII. Forecasts for ten different higher-order weak lensing statistics
Euclid Collaboration, V. Ajani, M. Baldi +211
Recent cosmic shear studies have shown that higher-order statistics (HOS) developed by independent teams now outperform standard two-point estimators in terms of statistical precis…
Euclid preparation. XXIV. Calibration of the halo mass function in CDM cosmologies
Euclid Collaboration, T. Castro, A. Fumagalli +179
Euclid's photometric galaxy cluster survey has the potential to be a very competitive cosmological probe. The main cosmological probe with observations of clusters is their number…
ShapePipe: a new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data
Axel Guinot, Martin Kilbinger, Samuel Farrens +16
UNIONS is an ongoing collaboration that will provide the largest deep photometric survey of the Northern sky in four optical bands to date. As part of this collaboration, CFIS is t…
Weak lensing mass reconstruction using sparsity and a Gaussian random field
J. -L. Starck, K. E. Themelis, N. Jeffrey +2
We introduce a novel approach to reconstruct dark matter mass maps from weak gravitational lensing measurements. The cornerstone of the proposed method lies in a new modelling of t…
Constraining neutrino masses with weak-lensing multiscale peak counts
Virginia Ajani, Austin Peel, Valeria Pettorino +3
Massive neutrinos influence the background evolution of the Universe as well as the growth of structure. Being able to model this effect and constrain the sum of their masses is on…
The impact of baryonic physics and massive neutrinos on weak lensing peak statistics
Matthew Fong, Miyoung Choi, Victoria Catlett +5
We study the impact of baryonic processes and massive neutrinos on weak lensing peak statistics that can be used to constrain cosmological parameters. We use the BAHAMAS suite of c…
Distinguishing standard and modified gravity cosmologies with machine learning
Austin Peel, Florian Lalande, Jean-Luc Starck +5
We present a convolutional neural network to classify distinct cosmological scenarios based on the statistically similar weak-lensing maps they generate. Modified gravity (MG) mode…
On the dissection of degenerate cosmologies with machine learning
Julian Merten, Carlo Giocoli, Marco Baldi +5
Based on the DUSTGRAIN-pathfinder suite of simulations, we investigate observational degeneracies between nine models of modified gravity and massive neutrinos. Three types of mach…
Breaking degeneracies in modified gravity with higher (than 2nd) order weak-lensing statistics
Austin Peel, Valeria Pettorino, Carlo Giocoli +2
General relativity (GR) has been well tested up to solar system scales, but it is much less certain that standard gravity remains an accurate description on the largest, that is, c…
Sparse reconstruction of the merging A520 cluster system
Austin Peel, François Lanusse, Jean-Luc Starck
Merging galaxy clusters present a unique opportunity to study the properties of dark matter in an astrophysical context. These are rare and extreme cosmic events in which the bulk…
Cosmological constraints with weak lensing peak counts and second-order statistics in a large-field survey
Austin Peel, Chieh-An Lin, Francois Lanusse +3
Peak statistics in weak lensing maps access the non-Gaussian information contained in the large-scale distribution of matter in the Universe. They are therefore a promising complem…
Effect of inhomogeneities on high precision measurements of cosmological distances
Austin Peel, M. A. Troxel, Mustapha Ishak
We study effects of inhomogeneities on distance measures in an exact relativistic Swiss-cheese model of the universe, focusing on the distance modulus. The model has LCDM backgroun…
The effects of structure anisotropy on lensing observables in an exact general relativistic setting for precision cosmology
M. A. Troxel, Mustapha Ishak, Austin Peel
The study of relativistic, higher order and nonlinear effects has become necessary in recent years in the pursuit of precision cosmology. We develop and apply here a framework to s…
Effects of anisotropy on gravitational infall in galaxy clusters using an exact general relativistic model
M. A. Troxel, Austin Peel, Mustapha Ishak
We study the effects and implications of anisotropies at the scale of galaxy clusters by building an exact general relativistic model of a cluster using the inhomogeneous and aniso…
Stringent Restriction from the Growth of Large-Scale Structure on Apparent Acceleration in Inhomogeneous Cosmological Models
Mustapha Ishak, Austin Peel, M. A. Troxel
Probes of cosmic expansion constitute the main basis for arguments to support or refute a possible apparent acceleration due to different expansion rates in the universe as describ…
Large-scale growth evolution in the Szekeres inhomogeneous cosmological models with comparison to growth data
Austin Peel, Mustapha Ishak, M. A. Troxel
We use the Szekeres inhomogeneous cosmological models to study the growth of large-scale structure in the universe including nonzero spatial curvature and a cosmological constant.…
The growth of structure in the Szekeres inhomogeneous cosmological models and the matter-dominated era
Mustapha Ishak, Austin Peel
This study belongs to a series devoted to using Szekeres inhomogeneous models to develop a theoretical framework where observations can be investigated with a wider range of possib…