How Tomographic Cosmic Shear Maps Lead to Constraints on Dark Energy Properties

Simple item page
dc.creatorZhan, Hu
dc.creatorKnox, Lloyd
dc.date2006-11-06
dc.date.accessioned2026-07-07T07:30:40Z
dc.date.available2026-07-07T07:30:40Z
dc.descriptionUsing a number of numerical tests and analytic arguments we investigate how measurements of cosmic shear lead to constraints on dark energy. We find that, in contrast to the case with galaxy number density correlation functions, standard rulers in the matter power spectrum play no significant role. Sensitivity to distance ratios is provided by the ratios in the lensing kernel. An absolute distance scale can only be established by breaking a potential degeneracy between growth and distance which can be done if the growth-redshift relation and distance-redshift relations are parameterized with sufficiently few parameters. For the quality of dark energy determination, growth determination is primarily important because it improves the distance reconstructions. The information about dark energy in the growth-redshift relation is always of secondary importance though the amount it contributes is highly dependent on what priors are taken in the cosmological parameter space. We also explain the dependence of dark energy constraints from cosmic shear, relative distance measures (supernovae) and absolute distance measures (baryon acoustic oscillations) on assumptions about the mean curvature.
dc.description10 pages, 3 figures, submitted to PRD
dc.identifierhttps://arxiv.org/abs/astro-ph/0611159
dc.identifierhttp://arxiv.org/abs/astro-ph/0611159
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/118483
dc.subjectAstrophysics
dc.titleHow Tomographic Cosmic Shear Maps Lead to Constraints on Dark Energy Properties
dc.typetext

Files

Collections

arXiv