1k citations · 4.6k across the 42 of their papers we have counts for
43 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+…
Simulation Tests of PSF Modeling for Cosmic Shear with the Vera C. Rubin Observatory
Claire-Alice Hébert, Erin S. Sheldon, Tianqing Zhang +3
Exceptional control of systematic effects is required in order to achieve unbiased cosmic shear two-point correlation function measurements with the next generation of galaxy imagi…
KiDS-1000: Improved constraints on cosmology, intrinsic alignments and baryonic feedback from clipped cosmic shear
Benjamin Giblin, Joachim Harnois-Déraps, Louise Paquereau +1
We present improved cosmological constraints from the fourth data release of the Kilo-Degree Survey ("KiDS-1000") using "clipped" shear correlation functions. Clipping filters the…
Cosmic shear beyond 2-point statistics: Accounting for galaxy intrinsic alignment with projected tidal fields
Joachim Harnois-Déraps, Nicolas Martinet, Robert Reischke
Developing analysis pipelines based on statistics beyond two-point functions is critical for extracting a maximal amount of cosmological information from current and upcoming weak…
A revised density split statistic model for general filters
Pierre Burger, Oliver Friedrich, Joachim Harnois-Déraps +1
Studying the statistical properties of the large-scale structure in the Universe with weak gravitational lensing is a prime goal of several current and forthcoming galaxy surveys.…
AMICO galaxy clusters in KiDS-DR3: cosmological constraints from large-scale stacked weak lensing profiles
Carlo Giocoli, Federico Marulli, Lauro Moscardini +15
Context. The large-scale mass distribution around dark matter haloes hosting galaxy clusters provides sensitive cosmological information. Aims. In this work, we make use of a large…
Impact of baryons in cosmic shear analyses with tomographic aperture mass statistics
Nicolas Martinet, Tiago Castro, Joachim Harnois-Déraps +3
NonGaussian cosmic shear statistics based on weak-lensing aperture mass () maps can outperform the classical shear two-point correlation function (-2PCF) in terms of…
Cosmic Shear Cosmology Beyond 2-Point Statistics: A Combined Peak Count and Correlation Function Analysis of DES-Y1
Joachim Harnois-Déraps, Nicolas Martinet, Tiago Castro +5
We constrain cosmological parameters from a joint cosmic shear analysis of peak-counts and the two-point shear correlation functions, as measured from the Dark Energy Survey (DES-Y…
Strong detection of the CMB lensingxgalaxy weak lensingcross-correlation from ACT-DR4,PlanckLegacy and KiDS-1000
Naomi Clare Robertson, David Alonso, Joachim Harnois-Déraps +48
We measure the cross-correlation between galaxy weak lensing data from the Kilo Degree Survey (KiDS-1000, DR4) and cosmic microwave background (CMB) lensing data from the Atacama C…
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…
Probing dark energy with tomographic weak-lensing aperture mass statistics
Nicolas Martinet, Joachim Harnois-Déraps, Eric Jullo +1
We forecast and optimize the cosmological power of various weak-lensing aperture mass () map statistics for future cosmic shear surveys, including peaks, voids, and the…
Persistent homology in cosmic shear: constraining parameters with topological data analysis
Sven Heydenreich, Benjamin Brück, Joachim Harnois-Déraps
In recent years, cosmic shear has emerged as a powerful tool to study the statistical distribution of matter in our Universe. Apart from the standard two-point correlation function…
A gravitational lensing detection of filamentary structures connecting luminous red galaxies
Qianli Xia, Naomi Robertson, Catherine Heymans +12
We present a weak lensing detection of filamentary structures in the cosmic web, combining data from the Kilo-Degree Survey, the Red Cluster Sequence Lensing Survey and the Canada-…
Non-Gaussianity in the Weak Lensing Correlation Function Likelihood -- Implications for Cosmological Parameter Biases
Chien-Hao Lin, Joachim Harnois-Déraps, Tim Eifler +4
We study the significance of non-Gaussianity in the likelihood of weak lensing shear two-point correlation functions, detecting significantly non-zero skewness and kurtosis in one-…
Painting with baryons: augmenting N-body simulations with gas using deep generative models
Tilman Tröster, Cameron Ferguson, Joachim Harnois-Déraps +1
Running hydrodynamical simulations to produce mock data of large-scale structure and baryonic probes, such as the thermal Sunyaev-Zeldovich (tSZ) effect, at cosmological scales is…
KiDS-450: Enhancing cosmic shear with clipping transformations
Benjamin Giblin, Catherine Heymans, Joachim Harnois-Déraps +12
We present the first "clipped" cosmic shear measurement using data from the Kilo-Degree Survey (KiDS-450). "Clipping" transformations suppress the signal from the highest density,…
Studying galaxy troughs and ridges using Weak Gravitational Lensing with the Kilo-Degree Survey
Margot M. Brouwer, Vasiliy Demchenko, Joachim Harnois-Déraps +15
We study projected underdensities in the cosmic galaxy density field known as 'troughs', and their overdense counterparts, which we call 'ridges'. We identify these regions using a…
The skewed weak lensing likelihood: why biases arise, despite data and theory being sound
Elena Sellentin, Catherine Heymans, Joachim Harnois-Déraps
We derive the essentials of the skewed weak lensing likelihood via a simple Hierarchical Model. Our likelihood passes four objective and cosmology-independent tests which a standar…
KiDS-450: Cosmological Constraints from Weak Lensing Peak Statistics-I: Inference from Analytical Prediction of High Signal-to-Noise Ratio Convergence Peaks
HuanYuan Shan, Xiangkun Liu, Hendrik Hildebrandt +19
This paper is the first of a series of papers constraining cosmological parameters with weak lensing peak statistics using of imaging data from the Kilo Degree…
KiDS-450: Cosmological Constraints from Weak Lensing Peak Statistics - II: Inference from Shear Peaks using N-body Simulations
Nicolas Martinet, Peter Schneider, Hendrik Hildebrandt +12
We study the statistics of peaks in a weak lensing reconstructed mass map of the first 450 square degrees of the Kilo Degree Survey. The map is computed with aperture masses direct…
KiDS+GAMA: Cosmology constraints from a joint analysis of cosmic shear, galaxy-galaxy lensing and angular clustering
Edo van Uitert, Benjamin Joachimi, Shahab Joudaki +19
We present cosmological parameter constraints from a joint analysis of three cosmological probes: the tomographic cosmic shear signal in 450 deg of data from the Kilo Deg…
KiDS-450: Tomographic Cross-Correlation of Galaxy Shear with {\it Planck} Lensing
Joachim Harnois-Déraps, Tilman Tröster, Nora Elisa Chisari +14
We present the tomographic cross-correlation between galaxy lensing measured in the Kilo Degree Survey (KiDS-450) with overlapping lensing measurements of the cosmic microwave back…
Precision calculations of the cosmic shear power spectrum projection
Martin Kilbinger, Catherine Heymans, Marika Asgari +9
We compute the spherical-sky weak-lensing power spectrum of the shear and convergence. We discuss various approximations, such as flat-sky, and first- and second- order Limber equa…
Cross-correlation of weak lensing and gamma rays: implications for the nature of dark matter
Tilman Tröster, Stefano Camera, Mattia Fornasa +12
We measure the cross-correlation between Fermi-LAT gamma-ray photons and over 1000 deg of weak lensing data from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS), t…