Weak lensing of large scale structure in the presence of screening
نویسندگان
چکیده
منابع مشابه
Simulating Weak Lensing by Large Scale Structure
We model weak gravitational lensing of light by large-scale structure using ray tracing through N-body simulations. The method is described with particular attention paid to numerical convergence. We investigate some of the key approximations in the multi-plane ray tracing algorithm. Our simulated shear and convergence maps are used to explore how well standard assumptions about weak lensing ho...
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Several recent papers have studied lensing of the CMB by large-scale structures, which probes the projected matter distribution from z = 10 to z ≃ 0. This interest is motivated in part by upcoming high resolution, high sensitivity CMB experiments, such as APEX/SZ, ACT, SPT or Planck, which should be sensitive to lensing. In this paper we examine the reconstruction of the large-scale dark matter...
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We describe an efficient algorithm for calculating the statistics of weak lensing by large-scale structure based on a tiled set of independent particle-mesh N-body simulations which telescope in resolution along the line of sight. This efficiency allows us to predict not only the mean properties of lensing observables such as the power spectrum, skewness and kurtosis of the convergence, but als...
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We use numerical simulations of ray tracing through N-body simulations to investigate weak lensing by large-scale structure. These are needed for testing the analytic predictions of twopoint correlators, to set error estimates on them and to investigate nonlinear gravitational effects in the weak lensing maps. On scales larger than 1 degree gaussian statistics suffice and can be used to estimat...
متن کاملCorrelation of CMB with large-scale structure. II. Weak lensing
Christopher M. Hirata,* Shirley Ho, Nikhil Padmanabhan, Uroš Seljak, and Neta A. Bahcall California Institute of Technology M/C 130-33, Pasadena, California 91125, USA Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, New Jersey 08544, USA Lawrence Berkeley National Labs, 1 Cyclotron Road Mississippi 50R-5032, Berkeley, California 94720, USA Institute for Theor...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2015
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2015/10/036