$C^\infty$ perturbations of FRW models with a cosmological constant
| dc.creator | Perjés, Zoltán | |
| dc.creator | Vasúth, Mátyás | |
| dc.creator | Czinner, Viktor | |
| dc.creator | Eriksson, Daniel | |
| dc.date | 2004-02-03 | |
| dc.date | 2004-12-20 | |
| dc.date.accessioned | 2026-07-07T02:12:06Z | |
| dc.date.available | 2026-07-07T02:12:06Z | |
| dc.description | Spatially homogeneous and isotropic cosmological models, with a perfect fluid matter source and non-vanishing cosmological constant, are studied. The equations governing linear perturbations of the space-time and the variation of energy density are given. The complete solution of the problem is obtained for $C^{\infty}$ perturbations, using a comoving time. The Sachs-Wolfe fluctuations of the temperature of the cosmic background radiation are obtained for the relatively growing density perturbations. It is found that the observable celestial microwave fluctuation pattern underwent a reversal approximately two billion years ago. What is observed today is a negative image of the last scattering surface with an attenuation of the fluctuations, due to the presence of the cosmological constant. | |
| dc.description | 15 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0402069 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0402069 | |
| dc.identifier | Astron.Astrophys. 431 (2005) 415-421 | |
| dc.identifier | doi:10.1051/0004-6361:20041472 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/7341 | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | $C^\infty$ perturbations of FRW models with a cosmological constant | |
| dc.type | text |