Concept
Univers observable
Publications associées (308)
CURLING - I. The influence of point-like image approximation on the outcomes of cluster strong lens modelling
Jean-Paul Richard Kneib, Huanyuan Shan, Nan Li
Cluster-scale strong lensing is a powerful tool for exploring the properties of dark matter and constraining cosmological models. However, due to the complex parameter space, pixelized strong lens modelling in galaxy clusters is computationally expensive, ...
Oxford Univ Press2024Euclid: Validation of the MontePython forecasting tools
Frédéric Courbin, Georges Meylan, Jean-Luc Starck, Maurizio Martinelli, Julien Lesgourgues, Slobodan Ilic, Yi Wang, Richard Massey
Context. The Euclid mission of the European Space Agency will perform a survey of weak lensing cosmic shear and galaxy clustering in order to constrain cosmological models and fundamental physics. Aims. We expand and adjust the mock Euclid likelihoods of t ...
Les Ulis Cedex A2024SUNBIRD : a simulation-based model for full-shape density-split clustering
Combining galaxy clustering information from regions of different environmental densities can help break cosmological parameter degeneracies and access non-Gaussian information from the density field that is not readily captured by the standard two-point c ...
2024Strong gravitational lensing's 'external shear' is not shear
David Richard Harvey, Mathilde Jauzac, Richard Massey
The distribution of mass in galaxy-scale strong gravitational lenses is often modelled as an elliptical power-law plus 'external shear', which notionally accounts for neighbouring galaxies and cosmic shear along our line of sight. A small amount of externa ...
Oxford Univ Press2024