Probing Dark Matter and Dark Energy with Space-Based Weak Lensing

Simple item page
dc.creatorMassey, Richard
dc.creatorRefregier, Alexandre
dc.creatorRhodes, Jason
dc.date2004-03-10
dc.date.accessioned2026-07-07T02:12:34Z
dc.date.available2026-07-07T02:12:34Z
dc.descriptionWeak lensing provides a direct measure of the distribution of mass in the universe, and is therefore a uniquely powerful probe of dark matter. Weak lensing can also be used to measure the twin phenomenon of dark energy, via its effect upon the cosmological growth rate of structures. Essential for this technique are well-resolved images of background galaxies out to large distances. As a concrete example of the surveys that will become available by the end of the decade, we consider the planned Supernova/Acceleration Probe (SNAP) space telescope. Detailed simulations of space-based images, manufactured using the shapelets formalism, enable us to quantitatively predict the future sensitivity to weak lensing shear. The high number density of galaxies resolved from space will enable maps of dark matter to be produced in two and three dimensions, with a resolution superior to that from the ground. Such observations will also afford reduced systematics for high-precision measurements of weak lensing statistics. These will be used to set tight constraints on cosmological parameters. In particular, the parameter for equation of state of dark energy, w, will be measured using weak lensing with a precision comparable to and somewhat orthogonal to constraints from other methods.
dc.description20 pages, 12 figures. Review talk from the meeting "Gravitational lensing : a unique tool for cosmology" held in Aussois, France, January 2003
dc.identifierhttps://arxiv.org/abs/astro-ph/0403229
dc.identifierhttp://arxiv.org/abs/astro-ph/0403229
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7497
dc.subjectAstrophysics
dc.titleProbing Dark Matter and Dark Energy with Space-Based Weak Lensing
dc.typetext

Files

Collections

arXiv