1999/01/21 by Bhuvnesh Jain, Uroš Seljak, Jain, Bhuvnesh +5
Physics and Astronomy · #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Scientific Research and Discoveries #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9901287
8 pages, 6 figures. To appear in Proceedings of the MPA/ESO Conference "Evolution of Large Scale Structure: From Recombination to Garching". Color figures and links at http://tarkus.pha.jhu.edu/~bjain/cluster_images.html
arxiv created 1999/01/21 · openalex publication_date 1999/01/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Selected results on estimating cosmological parameters from simulated weak lensing data with noise are presented. Numerical simulations of ray tracing through N-body simulations have been used to generate shear and convergence maps due to lensing by large-scale structure. Noise due to the intrinsic ellipticities of a finite number of galaxies is added. In this contribution we present our main results on estimation of the power spectrum and density parameter Omega from weak lensing data on several degree sized fields. We also show that there are striking morphological differences in the weak lensing maps of clusters of galaxies formed in models with different values of Omega.