A Time-dependent Cosmological Constant Phenomenology

Details A Time-dependent Cosmological Constant Phenomenology A Time-dependent Cosmological Constant Phenomenology

1996-05-29

arxiv.org/abs/astro-ph/9605176v1

NuovoCim.B112:1351-1359,1997

Astronomy and Astrophysics

Astrophysics

9 pages, Latex, submitted to Phys. Lett. A

Scientific paper

We construct a cosmological toy model in which a step-function ``cosmological
constant'' is taken into consideration beside ordinary matter. We assume that
$\Lambda$ takes two values depending on the epoch, and matter goes from a
radiation dominated era to a dust dominated era. The model is exactly solvable
and it can be compared with recent observations.

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