Observational and dynamical properties of small universes

Details Observational and dynamical properties of small universes Observational and dynamical properties of small universes

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phla..115...97e&link_type=abstract

Physics Letters A, Volume 115, Issue 3, p. 97-107.

Physics

70

Scientific paper

It is possible that we live in a ``small universe'', that is, we might have seen round the universe many times since decoupling so that there are many images of each galaxy. We estimate the number of images per galaxy in different small universes, and review how apparent isotropy of galactic observations and backgroung radiation measurements can naturally occur in such universes. Furthermore interesting physical effects may result; in particular, in some cases the dynamical behaviour of such space-times is necessarily like that of a Friedmann universe, so that inhomogeneous small universes may both look like and evolve like the standard isotropic and spatially homogeneous world models.

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