EXACT CONFORMAL SCALAR FIELD COSMOLOGIES

被引:30
作者
ABREU, JP
CRAWFORD, P
MIMOSO, JP
机构
[1] Departamento de Física, Universidade de Lisboa Campo Grande, Ed. C1
关键词
D O I
10.1088/0264-9381/11/8/002
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
New exact solutions of Einstein's gravity coupled to a self-interacting conformal scalar field are derived in this work. Our approach extends a solution-generating technique originally introduced by Bekenstein for massless conformal scalar fields. Solutions are obtained for a Friedmann-Robertson-Walker geometry both for the cases of zero and non-zero curvatures, and a variety of interesting features are found. It is shown that one class of solutions tends asymptotically to a power-law inflationary behaviour S(t) approximately t(p) with p > 1, while another class exhibits a late time approach to the S(t) approximately t behaviour of the coasting models. Bouncing models are also obtained. A general discussion of the asymptotic behaviour and of the possibility of occurrence of inflation is provided.
引用
收藏
页码:1919 / 1939
页数:21
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