A Low-Density Closed Universe

Details A Low-Density Closed Universe A Low-Density Closed Universe

1996-01-25

arxiv.org/abs/astro-ph/9601147v1

Phys.Rev.Lett.77:587-590,1996

Astronomy and Astrophysics

Astrophysics

9 pages, ReVTeX

Scientific paper

10.1103/PhysRevLett.77.587

Matter with an equation of state $p=-\rho/3$ may arise in certain scalar field theories, and the energy density of this matter decreases as $a^{-2}$ with the scale factor $a$ of the Universe. In this case, the Universe could be closed but still have a nonrelativistic-matter density $\Omega_0<1$. Furthermore, the cosmic microwave background could come from a causally-connected region at the other side of the Universe. This model is currently viable and might be tested by a host of forthcoming observations.

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