Weak Lensing by Large-Scale Structure: A Dark Matter Halo Approach

Weak gravitational lensing observations probe the spectrum and evolution of density fluctuations and the cosmological parameters which govern them but are currently limited to small fields and subject to selection biases. We show how the expected signal from large-scale structure arises from the con...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Cooray, Asantha, Hu, Wayne, Miralda-Escude, Jordi
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 14.03.2000
Subjects
Dark matter
Gravitational lenses
Halos
Large scale structure of the universe
Sample variance
Shot noise
Online AccessGet full text
ISSN2331-8422
DOI10.48550/arxiv.0003205

Cover

More Information
Summary:Weak gravitational lensing observations probe the spectrum and evolution of density fluctuations and the cosmological parameters which govern them but are currently limited to small fields and subject to selection biases. We show how the expected signal from large-scale structure arises from the contributions from and correlations between individual halos. We determine the convergence power spectrum as a function of the maximum halo mass and so provide the means to interpret results from surveys that lack high mass halos either through selection criteria or small fields. Since shot noise from rare massive halos is mainly responsible for the sample variance below 10', our method should aid our ability to extract cosmological information from small fields.
Bibliography:content type line 50
SourceType-Working Papers-1
ObjectType-Working Paper/Pre-Print-1
ISSN:2331-8422
DOI:10.48550/arxiv.0003205