340 citations · 709 across the 22 of their papers we have counts for
24 papers
Validation of harmonic-space likelihood methods for LiteBIRD B-mode polarisation analysis
G. Galloni, P. Campeti, C. Gimeno-Amo +112
The LiteBIRD satellite mission aims to measure the tensor-to-scalar ratio with unprecedented sensitivity through observations of the cosmic microwave background (CMB) -mode…
-sure. Part II. Scattering transforms as robustness test for tensor-to-scalar ratio detection from CMB observations
Claudio Ranucci, Sébastien Pierre, Léo Vacher +7
Galactic foregrounds represent a major contamination to the measurement of primordial -modes from observations of the Cosmic Microwave Background polarisation. Even after the ap…
Revealing Galactic dust beneath the cosmic infrared background anisotropies with Wavelet Phase Harmonics
Srijita Sinha, Tuhin Ghosh, Erwan Allys +2
Separating Galactic dust emission from cosmic infrared background (CIB) anisotropies is challenging because both the emission components have similar spectral properties. The prima…
Untangling dust emission and cosmic infrared background anisotropies with the scattering transform statistics
Srijita Sinha, Tuhin Ghosh, Erwan Allys +2
The template-fit approach is often used to separate Galactic dust emission from cosmic infrared background (CIB) anisotropies in low column density regions, under the a…
Bayesian imaging inverse problem with scattering transform
Sébastien Pierre, Erwan Allys, Pablo Richard +2
Bayesian imaging inverse problems in astrophysics and cosmology remain challenging, particularly in low-data regimes, due to complex forward operators and the frequent lack of well…
Separation of polarized dust emission in Planck observations with Scattering Transforms
Alexandros Tsouros, Elisa Russier, Erwan Allys +3
Polarized dust emission is a major astrophysical foreground contaminant of the cosmic microwave background polarization (CMB), which must be accurately measured to look for the fai…
Multiscale Turbulence Synthesis: Validation in 2D Hydrodynamics
Pierre Lesaffre, Jean-Baptiste Durrive, Jean Goossaert +5
Numerical simulations can follow the evolution of fluid motions through the intricacies of developed turbulence. However, they are rather costly to run, especially in 3D. In the pa…
Generative Models of 21cm EoR Lightcones with 3D Scattering Transforms
Ian Hothi, Erwan Allys, Benoit Semelin +1
The 21cm signal from the Epoch of Reionization (EoR) is observed as a three-dimensional data set known as a lightcone, consisting of a redshift (frequency) axis and two spatial sky…
Scattering transforms on the sphere, application to large scale structure modelling
Louise Mousset, Erwan Allys, Matthew A. Price +4
Scattering transforms are a new type of summary statistics recently developed for the study of highly non-Gaussian processes, which have been shown to be very promising for astroph…
Comparing the morphology of molecular clouds without supervision
Pablo Richard, Erwan Allys, François Levrier +2
Molecular clouds show complex structures reflecting their non-linear dynamics. Many studies investigating the bridge between their morphology and physical properties have shown the…
Generative models of astrophysical fields with scattering transforms on the sphere
Louise Mousset, Erwan Allys, Matthew A. Price +4
Scattering transforms are a new type of summary statistics recently developed for the study of highly non-Gaussian processes, which have been shown to be very promising for astroph…
Wavelet Based Statistics for Enhanced 21cm EoR Parameter Constraints
Ian Hothi, Erwan Allys, Benoit Semelin +1
We propose a new approach to improve the precision of astrophysical parameter constraints for the 21cm signal from the epoch of reionisation (EoR). Our method introduces new sets o…
Scattering Spectra Models for Physics
Sihao Cheng, Rudy Morel, Erwan Allys +2
Physicists routinely need probabilistic models for a number of tasks such as parameter inference or the generation of new realizations of a field. Establishing such models for high…
Separation of dust emission from the Cosmic Infrared Background in Herschel observations with Wavelet Phase Harmonics
Constant Auclair, Erwan Allys, François Boulanger +7
The low brightness dust emission at high Galactic latitude is of interest to study the interplay between physical processes in shaping the structure of the interstellar medium (ISM…
Generative Models of Multi-channel Data from a Single Example -- Application to Dust Emission
Bruno Régaldo-Saint Blancard, Erwan Allys, Constant Auclair +5
The quest for primordial -modes in the cosmic microwave background has emphasized the need for refined models of the Galactic dust foreground. Here, we aim at building a realist…
Non-Gaussian modelling and statistical denoising of Planck dust polarization full-sky maps using scattering transforms
J. -M. Delouis, E. Allys, E. Gauvrit +1
Scattering transforms have been successfully used to describe dust polarization for flat-sky images. This paper expands this framework to noisy observations on the sphere with the…
Wavelet Moments for Cosmological Parameter Estimation
Michael Eickenberg, Erwan Allys, Azadeh Moradinezhad Dizgah +10
Extracting non-Gaussian information from the non-linear regime of structure formation is key to fully exploiting the rich data from upcoming cosmological surveys probing the large-…
Quantification of high dimensional non-Gaussianities and its implication to Fisher analysis in cosmology
Core Francisco Park, Erwan Allys, Francisco Villaescusa-Navarro +1
It is well known that the power spectrum is not able to fully characterize the statistical properties of non-Gaussian density fields. Recently, many different statistics have been…
Single frequency CMB B-mode inference with realistic foregrounds from a single training image
Niall Jeffrey, François Boulanger, Benjamin D. Wandelt +3
With a single training image and using wavelet phase harmonic augmentation, we present polarized Cosmic Microwave Background (CMB) foreground marginalization in a high-dimensional…
A new approach for the statistical denoising of Planck interstellar dust polarization data
Bruno Regaldo-Saint Blancard, Erwan Allys, François Boulanger +2
Dust emission is the main foreground for cosmic microwave background (CMB) polarization. Its statistical characterization must be derived from the analysis of observational data be…
Statistical description of dust polarized emission from the diffuse interstellar medium -- A RWST approach
Bruno Regaldo-Saint Blancard, François Levrier, Erwan Allys +2
The statistical characterization of the diffuse magnetized ISM and Galactic foregrounds to the CMB poses a major challenge. To account for their non-Gaussian statistics, we need a…
New Interpretable Statistics for Large Scale Structure Analysis and Generation
E. Allys, T. Marchand, J. -F. Cardoso +3
We introduce Wavelet Phase Harmonics (WPH) statistics: interpretable low-dimensional statistics that describe 2D non-Gaussian fields. These statistics are built from WPH moments, w…
The Quijote simulations
Francisco Villaescusa-Navarro, ChangHoon Hahn, Elena Massara +26
The Quijote simulations are a set of 44,100 full N-body simulations spanning more than 7,000 cosmological models in the hyperplane.…
The RWST, a comprehensive statistical description of the non-Gaussian structures in the ISM
E. Allys, F. Levrier, S. Zhang +5
The interstellar medium (ISM) is a complex non-linear system governed by gravity and magneto-hydrodynamics, as well as radiative, thermodynamical, and chemical processes. Our under…