Constraining Dark Energy Evolution with Gravitational Lensing by Large Scale Structures
| dc.creator | Benabed, Karim | |
| dc.creator | Van Waerbeke, Ludovic | |
| dc.date | 2003-06-02 | |
| dc.date.accessioned | 2026-07-07T10:26:58Z | |
| dc.date.available | 2026-07-07T10:26:58Z | |
| dc.description | We study the sensitivity of weak lensing by large scale structures to the evolution of dark energy. We explore a 2-parameters model of dark energy evolution, inspired by tracking quintessence models. To this end, we compute the likelihood of a few representative models with varying and non varying equation of states. Based on an earlier work, we show that the evolution of dark energy has a much stronger impact on the non-linear structure growth than on the angular diameter distance, which makes large scale structure measurements a very efficient probe of this evolution. For the different models, we investigate the dark energy parameters degeneracies with the mass power spectrum shape Gamma, normalisation sigma_8, and with the matter mean density Omega_M. This result is a strong motivation for performing large scale structure simulations beyond the simple constant dark energy models, in order to calibrate the non-linear regime accurately. Prospective for the Canada France Hawaii Telescope Legacy Survey (CFHTLS) and Super-Novae Acceleration Probe (SNAP) are given. These results complement nicely the cosmic microwave background and Super-Novae constraints. Weak lensing is shown to be more sensitive to a variation of the equation of state, whereas CMB and SNIa give information on its constant part. | |
| dc.description | Submitted to Physical Review D | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0306033 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0306033 | |
| dc.identifier | Phys.Rev.D70:123515,2004 | |
| dc.identifier | doi:10.1103/PhysRevD.70.123515 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177019 | |
| dc.subject | Astrophysics | |
| dc.title | Constraining Dark Energy Evolution with Gravitational Lensing by Large Scale Structures | |
| dc.type | text |