Reconstruction and exact solutions for cosmological perturbations from a generalized gravity theory

被引：3
|
作者：
Antonio Belinchon, Jose [1 ]
Gonzalez, Carlos [2 ]
Herrera, Ramon [3 ]
机构：
[1] Univ Atacama, Fac Ingn, Dept Matemat, Ave Copayapu 485, Copiapo, Chile
[2] Univ Atacama, Dept Fis, Ave Copayapu 485, Copiapo, Chile
[3] Pontificia Univ Catolica Valparaiso, Inst Fis, Ave Brasil 2950,Casilla 4059, Valparaiso, Chile
来源：
GENERAL RELATIVITY AND GRAVITATION | 2020年 / 52卷 / 04期
关键词：
General relativity; Cosmology; Cosmolgy perturbations theory; INFLATIONARY UNIVERSE SCENARIO; BROKEN-SYMMETRIC THEORY; SCALAR-TENSOR THEORY; DENSITY PERTURBATIONS; SPECTRUM; FIELD; CONSTRAINTS; GENERATION; RELATIVITY; ATTRACTOR;
D O I：
10.1007/s10714-020-02685-z
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Scalar and tensor cosmological perturbations during an inflationary universe scenario in the context of the a generalized gravity theory are studied. This analyze is carried out considering an ansatz on the variables associated to scalar and tensor perturbation (zs and zt) in the Jordan frame. In this context, we analyze two different Ansatze for the ratio zs/zt, and we study in great detail the analytical and exact solutions for the cosmological perturbations together with the corresponding reconstruction of the background variables. Recent observational data from the Planck 2018 results are employed to constrain the parameters of each of the models.
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页数：22
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