648 citations · 2.7k across the 25 of their papers we have counts for
25 papers
On cosmological bias due to the magnification of shear and position samples in modern weak lensing analyses
Christopher A. J. Duncan, Joachim Harnois-Déraps, Lance Miller
The magnification of galaxies in modern galaxy surveys induces additional correlations in the cosmic shear, galaxy-galaxy lensing and clustering observables used in modern lensing…
An adapted filter function for density split statistics in weak lensing
Pierre Burger, Peter Schneider, Vasiliy Demchenko +4
Context. The density split statistics in weak gravitational lensing analyses probes the correlation between regions of different (foreground) galaxy number densities and their weak…
Cosmic Shear Covariance Matrix in CDM: Cosmology Matters
Joachim Harnois-Deraps, Benjamin Giblin, Benjamin Joachimi
We present here the cosmo-SLICS, a new suite of simulations specially designed for the analysis of current and upcoming weak lensing data beyond the standard two-point cosmic shear…
Consistent cosmic shear in the face of systematics: a B-mode analysis of KiDS-450, DES-SV and CFHTLenS
Marika Asgari, Catherine Heymans, Hendrik Hildebrandt +8
We analyse three public cosmic shear surveys; the Kilo-Degree Survey (KiDS-450), the Dark Energy Survey (DES-SV) and the Canada France Hawaii Telescope Lensing Survey (CFHTLenS). A…
Dark Matter Distribution Induced by a Cosmic String Wake in the Nonlinear Regime
Disrael Cunha, Joachim Harnois-Deraps, Robert Brandenberger +2
We study the distribution of dark matter in the nonlinear regime in a model in which the primordial fluctuations include, in addition to the dominant primordial Gaussian fluctuatio…
The BAHAMAS project: the CMB--large-scale structure tension and the roles of massive neutrinos and galaxy formation
Ian G. McCarthy, Simeon Bird, Joop Schaye +3
Recent studies have presented evidence for tension between the constraints on Omega_m and sigma_8 from the cosmic microwave background (CMB) and measurements of large-scale structu…
KiDS+2dFLenS+GAMA: Testing the cosmological model with the statistic
A. Amon, C. Blake, C. Heymans +17
We present a new measurement of , which combines measurements of weak gravitational lensing, real-space galaxy clustering and redshift space distortions. This statistic…
KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering
Shahab Joudaki, Chris Blake, Andrew Johnson +19
We perform a combined analysis of cosmic shear tomography, galaxy-galaxy lensing tomography, and redshift-space multipole power spectra (monopole and quadrupole) using 450 deg…
2dFLenS and KiDS: Determining source redshift distributions with cross-correlations
Andrew Johnson, Chris Blake, Alexandra Amon +16
We develop a statistical estimator to infer the redshift probability distribution of a photometric sample of galaxies from its angular cross-correlation in redshift bins with an ov…
Cosmological neutrino simulations at extreme scale
J. D. Emberson, Hao-Ran Yu, Derek Inman +8
Constraining neutrino mass remains an elusive challenge in modern physics. Precision measurements are expected from several upcoming cosmological probes of large-scale structure. A…
The 2-degree Field Lensing Survey: design and clustering measurements
Chris Blake, Alexandra Amon, Michael Childress +16
We present the 2-degree Field Lensing Survey (2dFLenS), a new galaxy redshift survey performed at the Anglo-Australian Telescope. 2dFLenS is the first wide-area spectroscopic surve…
CFHTLenS revisited: assessing concordance with Planck including astrophysical systematics
Shahab Joudaki, Chris Blake, Catherine Heymans +9
We investigate the impact of astrophysical systematics on cosmic shear cosmological parameter constraints from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS), and the…
Revisiting CFHTLenS cosmic shear: Optimal E/B mode decomposition using COSEBIs and compressed COSEBIs
Marika Asgari, Catherine Heymans, Chris Blake +3
We present a re-analysis of the CFHTLenS weak gravitational lensing survey using Complete Orthogonal Sets of E/B-mode Integrals, known as COSEBIs. COSEBIs provide a complete set of…
RCSLenS: Testing gravitational physics through the cross-correlation of weak lensing and large-scale structure
Chris Blake, Shahab Joudaki, Catherine Heymans +8
The unknown nature of dark energy motivates continued cosmological tests of large-scale gravitational physics. We present a new consistency check based on the relative amplitude of…
Precision reconstruction of the dark matter-neutrino relative velocity from N-body simulations
Derek Inman, J. D. Emberson, Ue-Li Pen +3
Discovering the mass of neutrinos is a principle goal in high energy physics and cosmology. In addition to cosmological measurements based on two-point statistics, the neutrino mas…
Dissecting the thermal Sunyaev-Zeldovich-gravitational lensing cross-correlation with hydrodynamical simulations
Alireza Hojjati, Ian G. McCarthy, Joachim Harnois-Deraps +4
We use the cosmo-OWLS suite of cosmological hydrodynamical simulations, which includes different galactic feedback models, to predict the cross-correlation signal between weak grav…
Simulations of Weak Gravitational Lensing - II : Including Finite Support Effects in Cosmic Shear Covariance Matrices
Joachim Harnois-Deraps, Ludovic van Waerbeke
(Abridged) We investigate and quantify the impact of finite simulation volume on weak lensing two- and four-point statistics. These {\it finite support} (FS) effects are modelled f…
CFHTLenS tomographic weak lensing cosmological parameter constraints: Mitigating the impact of intrinsic galaxy alignments
Catherine Heymans, Emma Grocutt, Alan Heavens +21
We present a finely-binned tomographic weak lensing analysis of the Canada-France-Hawaii Telescope Lensing Survey, CFHTLenS, mitigating contamination to the signal from the presenc…
CFHTLenS: Combined probe cosmological model comparison using 2D weak gravitational lensing
Martin Kilbinger, Liping Fu, Catherine Heymans +20
We present cosmological constraints from 2D weak gravitational lensing by the large-scale structure in the Canada-France Hawaii Telescope Lensing Survey (CFHTLenS) which spans 154…
Non-Gaussian error bars in galaxy surveys -- II
Joachim Harnois-Deraps, Ue-Li Pen
(Abridged) Estimating the uncertainty on the matter power spectrum internally (i.e. directly from the data) is made challenging by the simple fact that galaxy surveys offer at most…
High Performance P3M N-body code: CUBEP3M
Joachim Harnois-Deraps, Ue-Li Pen, Ilian T. Iliev +3
This paper presents CUBEP3M, a publicly-available high performance cosmological N-body code and describes many utilities and extensions that have been added to the standard package…
Optimizing the Recovery of Fisher Information in the Dark Matter Power Spectrum
Joachim Harnois-Deraps, Hao-Ran Yu, Tong-Jie Zhang +1
We combine two Gaussianization techniques - Wavelet Non-Linear Wiener Filter (WNLWF) and density reconstruction - to quantify the recovery of Fisher information that is lost in the…
Cosmic Tides
Ue-Li Pen, Ravi Sheth, J. Harnois-Deraps +2
We apply CMB lensing techniques to large scale structure and solve for the 3-D cosmic tidal field. We use small scale filamentary structures to solve for the large scale tidal shea…
Gravitational Lensing Simulations I : Covariance Matrices and Halo Catalogues
Joachim Harnois-Deraps, Sanaz Vafaei, Ludovic Van Waerbeke
Gravitational lensing surveys have now become large and precise enough that the interpretation of the lensing signal has to take into account an increasing number of theoretical li…