NONSCALE-INVARIANT DENSITY PERTURBATIONS FROM CHAOTIC EXTENDED INFLATION

被引:23
作者
MOLLERACH, S [1 ]
MATARRESE, S [1 ]
机构
[1] UNIV PADUA,DIPARTIMENTO FIS GALILEO GALILEI,I-35131 PADUA,ITALY
来源
PHYSICAL REVIEW D | 1992年 / 45卷 / 06期
关键词
D O I
10.1103/PhysRevD.45.1961
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Chaotic inflation is analyzed in the frame of scalar-tensor theories of gravity. Fluctuations in the energy density arise from quantum fluctuations of the Brans-Dicke field and of the inflaton field. The spectrum of perturbations is studied for a class of models: it is non-scale-invariant and, for certain values of the parameters, it has a peak. If the peak appears at astrophysically interesting scales it may help to reconcile the cold-dark-matter scenario for structure formation with large-scale observations.
引用
收藏
页码:1961 / 1970
页数:10
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