48 citations · 270 across the 12 of their papers we have counts for
14 papers
Impact of galaxy intrinsic alignments on non-Gaussian weak lensing statistics for modified gravity
Mehar Chawla, Christopher T. Davies, Joachim Harnois-Déraps +3
Non-Gaussian weak lensing statistics improve the constraining power of cosmic shear data by harvesting information unavailable to two-point statistics, within and beyond the GR+…
Constraining modified gravity with weak lensing peaks
Christopher T. Davies, Joachim Harnois-Déraps, Baojiu Li +3
It is well established that maximizing the information extracted from upcoming and ongoing stage-IV weak-lensing surveys requires higher-order summary statistics that complement th…
Ray-tracing vs. Born approximation in full-sky weak lensing simulations of the MillenniumTNG project
Fulvio Ferlito, Christopher T. Davies, Volker Springel +7
Weak gravitational lensing is a powerful tool for precision tests of cosmology. As the expected deflection angles are small, predictions based on non-linear N-body simulations are…
An emulator-based halo model in modified gravity -- I. The halo concentration-mass relation and density profile
Cheng-Zong Ruan, Carolina Cuesta-Lazaro, Alexander Eggemeier +7
In this series of papers we present an emulator-based halo model for the non-linear clustering of galaxies in modified gravity cosmologies. In the first paper, we present emulators…
MGLenS: Modified gravity weak lensing simulations for emulation-based cosmological inference
Joachim Harnois-Déraps, Cesar Hernandez-Aguayo, Carolina Cuesta-Lazaro +4
We present MGLenS, a large series of modified gravity lensing simulations tailored for cosmic shear data analyses and forecasts in which cosmological and modified gravity parameter…
Cosmological forecasts with the clustering of weak lensing peaks
Christopher T. Davies, Marius Cautun, Benjamin Giblin +3
Maximising the information that can be extracted from weak lensing measurements is a key goal for upcoming surveys such as LSST and Euclid. This is typically achieved through stati…
Proca-stinated Cosmology II: Matter, Halo, and Lensing Statistics in the vector Galileon
Christoph Becker, Alexander Eggemeier, Christopher T. Davies +1
The generalised Proca (GP) theory is a modified gravity model in which the acceleration of the cosmic expansion rate can be explained by self interactions of a cosmological vector…
Constraining cosmology with weak lensing voids
Christopher T. Davies, Marius Cautun, Benjamin Giblin +3
Upcoming surveys such as \LSST{} and \Euclid{} will significantly improve the power of weak lensing as a cosmological probe. To maximise the information that can be extracted from…
Optimal void finders in weak lensing maps
Christopher T. Davies, Enrique Paillas, Marius Cautun +1
Cosmic voids are a key component of the large-scale structure that contain a plethora of cosmological information. Typically, voids are identified from the underlying galaxy distri…
The Accuracy of Weak Lensing Simulations
Stefan Hilbert, Alexandre Barreira, Giulio Fabbian +9
We investigate the accuracy of weak lensing simulations by comparing the results of five independently developed lensing simulation codes run on the same input -body simulation.…
Cosmological test of gravity using weak lensing voids
Christopher T. Davies, Marius Cautun, Baojiu Li
Modifications to General Relativity (GR) often incorporate screening mechanisms in order to remain compatible with existing tests of gravity. The screening is less efficient in und…
The self similarity of weak lensing peaks
Christopher T. Davies, Marius Cautun, Baojiu Li
We study the statistics of weak lensing convergence peaks, such as their abundance and two-point correlation function (2PCF), for a wide range of cosmological parameters and…
Cosmic voids: a novel probe to shed light on our Universe
Alice Pisani, Elena Massara, David N. Spergel +26
Cosmic voids, the less dense patches of the Universe, are promising laboratories to extract cosmological information. Thanks to their unique low density character, voids are extrem…
Weak lensing by voids in weak lensing maps
Christopher T. Davies, Marius Cautun, Baojiu Li
Cosmic voids are an important probe of large-scale structure that can constrain cosmological parameters and test cosmological models. We present a new paradigm for void studies: vo…