FRW Universe Models in Conformally Flat Spacetime Coordinates. III: Universe models with positive spatial curvature

Details FRW Universe Models in Conformally Flat Spacetime Coordinates. III: Universe models with positive spatial curvature FRW Universe Models in Conformally Flat Spacetime Coordinates. III: Universe models with positive spatial curvature

2011-03-24

arxiv.org/abs/1103.4753v1

Eur.Phys.J.Plus 126:30,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

22 pages, 9 figures

Scientific paper

10.1140/epjp/i2011-11030-0

We deduce general expressions for the line element of universe models with positive spatial curvature described by conformally flat spacetime coordinates. Models with dust, radiation and vacuum energy are exhibited. Discussing the existence of particle horizons we show that there is continual annihilation of space, matter and energy in a dust and radiation dominated universe, and continual creation in a LIVE domined universe when conformal time is used in Friedmann-Robertson-Walker models with positive spatial curvature. A general procedure is given for finding coordinates to be used in Penrose diagrams. We also calculate the age and the redshift of some universe models using conformal time.

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