Cosmological Backreaction from Perturbations
| dc.creator | Behrend, Juliane | |
| dc.creator | Brown, Iain A. | |
| dc.creator | Robbers, Georg | |
| dc.date | 2007-10-26 | |
| dc.date | 2007-12-18 | |
| dc.date.accessioned | 2026-07-07T11:12:37Z | |
| dc.date.available | 2026-07-07T11:12:37Z | |
| dc.description | We reformulate the averaged Einstein equations in a form suitable for use with Newtonian gauge linear perturbation theory and track the size of the modifications to standard Robertson-Walker evolution on the largest scales as a function of redshift for both Einstein de-Sitter and Lambda CDM cosmologies. In both cases the effective energy density arising from linear perturbations is of the order of 10^-5 the matter density, as would be expected, with an effective equation of state w ~ -1/19. Employing a modified Halofit code to extend our results to quasilinear scales, we find that, while larger, the deviations from Robertson-Walker behaviour remain of the order of 10^-5. | |
| dc.description | 15 pages, 8 figures; replaced by version accepted by JCAP | |
| dc.identifier | https://arxiv.org/abs/0710.4964 | |
| dc.identifier | http://arxiv.org/abs/0710.4964 | |
| dc.identifier | JCAP0801:013,2008 | |
| dc.identifier | doi:10.1088/1475-7516/2008/01/013 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/191443 | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Cosmological Backreaction from Perturbations | |
| dc.type | text |