A Numerical Study of Cosmic Shear Statistics

Simple item page
dc.creatorThion, A.
dc.creatorMellier, Y.
dc.creatorBernardeau, F.
dc.creatorBertin, E.
dc.creatorErben, T.
dc.creatorvan Waerbeke, L.
dc.date2000-08-11
dc.date.accessioned2026-07-07T01:54:54Z
dc.date.available2026-07-07T01:54:54Z
dc.descriptionWe explore the stability of the variance and skewness of the cosmic gravitational convergence field, using two different approaches: first we simulate a whole MEGACAM survey (100 sq. degrees). The reconstructed mass map, obtained from a shear map, shows that the state-of-the-art data analysis methods can measure weak-lensing statistics at angular scales ranging from 2.5' to 25'. We looked also at the influence of a varying signal-to-noise ratio over the shear map (due to local variations of source density) on the mass reconstruction, by means of Monte-Carlo simulation. The effect at small scales can easily be corrected-for in most of the relevant cases. These results enhance the confidence in the capability of future large surveys to measure accurately cosmologically interesting quantities.
dc.descriptionLatex, 2 pages, moriond2000.sty and psfig.sty, gzipped tar file. To appear in the Proceedings of the XXth Moriond Astrophysics Meeting "Cosmological Physics with Gravitational Lensing", eds. J.-P. Kneib, Y. Mellier, M. Moniez and J. Tran Thanh Van
dc.identifierhttps://arxiv.org/abs/astro-ph/0008180
dc.identifierhttp://arxiv.org/abs/astro-ph/0008180
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/1473
dc.subjectAstrophysics
dc.titleA Numerical Study of Cosmic Shear Statistics
dc.typetext

Files

Collections

arXiv