Warm-intermediate inflationary universe model with viscous pressure in high dissipative regime

被引:19
作者
Setare, M. R. [1 ]
Kamali, V. [1 ]
机构
[1] Univ Kurdistan, Dept Sci, Sanandaj, Iran
关键词
Warm inflation model; Viscous pressure; Cosmological perturbations; Recent observational; DYNAMICS; SPECTRA; HORIZON;
D O I
10.1007/s10714-014-1698-y
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Warm inflation model with bulk viscous pressure in the context of "intermediate inflation" where the cosmological scale factor expands as a(t) = a(0) exp(At-f), is studied. The characteristics of this model in slow-roll approximation and in high dissipative regime are presented in two cases: 1-Dissipative parameter Gamma as a function of scalar field phi and bulk viscous coefficient zeta as a function of energy density rho. 2-Gamma and zeta are constant parameters. Scalar, tensor perturbations and spectral indices for this scenario are obtained. The cosmological parameters appearing in the present model are constrained by recent observational data (WMAP7).
引用
收藏
页码:1 / 15
页数:15
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