Deflationary $Λ(t)$ cosmology: observational expressions

Preprint

6 March 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/0202217

Abstract

We discuss the classical cosmological tests for a large class of FRW type models driven by a decaying vacuum energy density. Analytic expressions for the lookback time, age of the universe, luminosity distance, angular diameter, and galaxy number counts versus redshift are derived and their meaning discussed in detail. It is found that the standard FRW results are significantly altered, showing that such tests may constrain the physical parameters of these models which are also in agreement to the accelerated expansion suggested by the latest SNe type Ia observations.

Keywords

CLASSICAL COSMOLOGICAL
LUMINOSITY DISTANCE
COSMOLOGICAL TESTS
GALAXY NUMBER
DEFLATIONARY
LARGE CLASS
COSMOLOGY
FRW

All Related Versions

Version 1, 2002-02-12, ArXiv
Version 2, 2002-02-22, ArXiv
Version 3, 2002-03-06, ArXiv
Published version: Astronomy & Astrophysics, 390 (3), 809.

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