Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-04-06
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
8 pages, 4 figures; v1 contains an error, a resubmittable version is being prepared; v2 only updates this comments field
Scientific paper
Observational evidence of dark energy that makes the Universe nearly flat at the present epoch is very strong. We study the link between spatial continuity and dark energy. We assume that comoving space is a compact 3-manifold of constant curvature, described by a homogeneous Friedman-Lemaitre-Robertson-Walker metric. We assume that spatial continuity cannot be violated, i.e. that the global topology of the comoving section of the Universe cannot change during post-quantum epochs. We find that if the Universe was flat and compact during early epochs, then the presently low values of the radiation and matter densities imply that dark energy was created as a spatial continuity effect. Moreover, if the Universe is compact, then Omega_tot=1 is dynamically stable, where Omega_tot is the total density parameter in units of the critical density. Dark energy was observationally detected as a geometrical phenomenon. It is difficult to imagine a simpler explanation for dark energy than spatial continuity, finiteness and homogeneity.
Blanloeil Vincent
Roukema Boudewijn F.
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