Power spectrum from weak-shear data
| dc.creator | Bartelmann, Matthias | |
| dc.creator | Schneider, Peter | |
| dc.date | 1999-02-10 | |
| dc.date.accessioned | 2026-07-07T02:30:24Z | |
| dc.date.available | 2026-07-07T02:30:24Z | |
| dc.description | We demonstrate that the aperture mass as a measure for cosmic shear closely approximates (to better than ~5%) the scaled and shifted power spectrum of the projected mass density. This cosmological weak-lensing information can thus be used to directly infer the projected matter power spectrum with high accuracy. As an application, we show that aperture-mass observations can be used to constrain the cosmic density parameter and the power-spectrum amplitude. We show that, for a particular example, it should be possible to constrain Omega_0 to within ~ +/- 27%, and sigma_8 to within ~ +/- 8% using weak-shear data on a square-shaped field of 8 degrees side length. | |
| dc.description | 4 pages including 4 figures. Accepted for publication in Astronomy & Astrophysics | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9902152 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9902152 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/13804 | |
| dc.subject | Astrophysics | |
| dc.title | Power spectrum from weak-shear data | |
| dc.type | text |