| Issue |
A&A
Volume 390, Number 3, August II 2002
|
|
|---|---|---|
| Page(s) | 809 - 815 | |
| Section | Astrophysical processes | |
| DOI | https://doi.org/10.1051/0004-6361:20020746 | |
| Published online | 14 August 2002 | |
Deflationary 
cosmology: Observational expressions
Departamento de Física, Universidade Federal do Rio Grande do Norte, CP 1641, 59072-970 Natal, RN, Brasil
Corresponding author: J. A. S. Lima, limajas@dfte.ufrn.br
Received:
23
January
2002
Accepted:
15
May
2002
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 cold dark matter (CDM) results are significantly altered, showing that such tests may constrain appreciably the physical parameters of these models which are also in agreement with the accelerated expansion suggested by the latest SNe type Ia observations. Cosmology: decaying vacuum, kinematic tests
Key words: cosmology: observations / cosmology: theory / cosmology: distance scale
© ESO, 2002
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