RECOVERING THE COSMOLOGICAL CONSTANT IN SCALAR-TENSOR COSMOLOGIES

Authors
CAPOZZIELLO S DERITIS R
Citation
S. Capozziello et R. Deritis, RECOVERING THE COSMOLOGICAL CONSTANT IN SCALAR-TENSOR COSMOLOGIES, General relativity and gravitation, 29(11), 1997, pp. 1425-1444
Citations number
43
Categorie Soggetti
Physics
Journal title
General relativity and gravitation → ACNP
ISSN journal
00017701
Volume
29
Issue
11
Year of publication
1997
Pages
1425 - 1444
Database
ISI
SICI code
0001-7701(1997)29:11<1425:RTCCIS>2.0.ZU;2-5
Abstract
We extend the cosmic no-hair theorem to a general class of scalar-tens or nonminimally coupled theories of gravity where ordinary matter is a lso present in the form of a perfect fluid. We give a set of condition s for obtaining an asymptotic de Sitter expansion, independently of an y initial data, by a sort of time-dependent (effective) cosmological c onstant. Finally we apply the results to some specific models.