机构:Astronomy Centre, University of Sussex, Brighton BN1 9QH, Sussex
BARROW, JD
机构:
[1] Astronomy Centre, University of Sussex, Brighton BN1 9QH, Sussex
来源:
PHYSICAL REVIEW D
|
1993年
/
48卷
/
08期
关键词:
D O I:
10.1103/PhysRevD.48.3592
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
We present a class of scalar-tensor gravity theories which admit simple Friedmann cosmological models in the vacuum and radiation-dominated cases. A subclass of these theories yields a one-parameter family of cosmological models displaying either expansion from an initial singularity or a bounce following contraction from an infinite extended initial state.