43 citations · 227 across the 12 of their papers we have counts for
12 papers · 1 filter
On the estimation of gravity-induced non-Gaussianities from weak lensing surveys
Patrick Valageas, Dipak Munshi, Andrew J. Barber
We study various measures of weak lensing distortions in future surveys, taking into account the noise arising from the finite survey size and the intrinsic ellipticity of galaxies…
Weak lensing shear and aperture-mass from linear to non-linear scales
Dipak Munshi, Patrick Valageas, Andrew J. Barber
In this paper we describe the predictions for the smoothed weak lensing shear and aperture-mass of two simple analytical models of the density field: the minimal tree-model and the…
From linear to non-linear scales: analytical and numerical predictions for the weak lensing convergence
Andrew J. Barber, Dipak Munshi, Patrick Valageas
Weak lensing convergence can be used directly to map and probe the dark mass distribution in the universe. Building on earlier studies, we recall how the statistics of the converge…
Analytical Predictions for Statistics of Cosmic Shear: Tests Against Simulations
Patrick Valageas, Andrew J. Barber, Dipak Munshi
Weak gravitational lensing surveys are rapidly becoming important tools to probe directly the mass density fluctuations in the universe and its background dynamics. Earlier studies…
Shear and magnification angular power spectra and higher-order moments from weak gravitational lensing
Andrew J. Barber, A. N. Taylor
We present new results on the gravitational lensing shear and magnification power spectra obtained from numerical simulations of a flat cosmology with a cosmological constant. Thes…
The Effects of Weak Gravitational Lensing on Determinations of the Cosmology from Type Ia Supernovæ
Andrew J. Barber
Underlying cosmologies with deceleration parameter, may be interpreted as having on the basis of weak gravitational lensing effects.
The redshift and scale dependence of the cosmic shear signal from numerical simulations
Andrew J. Barber
The weak lensing shear signal has been measured numerically in -body simulations at 14 different redshifts ( to 3.6) and on angular scales of to 32'. In addit…
Significant effects of weak gravitational lensing on determinations of the cosmology from Type Ia Supernovæ
Andrew J. Barber
Significant adjustments to the values of the cosmological parameters estimated from high-redshift Type Ia Supernovædata are reported, almost an order of magnitude greater than prev…
Weak gravitational lensing in different cosmologies, using an algorithm for shear in three dimensions
Andrew J. Barber, Peter A. Thomas, H. M. P. Couchman +1
We present the results of weak gravitational lensing statistics in four different cosmological -body simulations. The data has been generated using an algorithm for the three-di…
The local to global ratio and the SNe Ia results
Simon P. Goodwin, Peter A. Thomas, Andrew J. Barber +2
The effects of differences between the local and global values of the Hubble parameter on the cosmologies consistent with studies of high-redshift Type Ia supernovæare discussed. I…
Weak gravitational lensing in the standard Cold Dark Matter model, using an algorithm for three-dimensional shear
Andrew J. Barber, Peter A. Thomas, H. M. P. Couchman
We investigate the effects of weak gravitational lensing in the standard Cold Dark Matter cosmology, using an algorithm which evaluates the shear in three dimensions. The algorithm…
Measuring the three-dimensional shear from simulation data, with applications to weak gravitational lensing
H. M. P. Couchman, Andrew J. Barber, Peter A. Thomas
We have developed a new three-dimensional algorithm, based on the standard PM method, for computing deflections due to weak gravitational lensing. We compare the results of thi…