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

José Antonio Belinchón; Carlos González; Ramón Herrera

doi:10.1007/s10714-020-02685-z

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

José Antonio Belinchón, Carlos González, Ramón Herrera

INSTITUTE OF PHYSICS

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2 Scopus citations

Abstract

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 (z_s and z_t) in the Jordan frame. In this context, we analyze two different Ansatze for the ratio z_s/ z_t, 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.

Original language	English
Article number	35
Journal	General Relativity and Gravitation
Volume	52
Issue number	4
DOIs	https://doi.org/10.1007/s10714-020-02685-z
State	Published - 1 Apr 2020

Keywords

Cosmolgy perturbations theory
Cosmology
General relativity

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10.1007/s10714-020-02685-z

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AU - Belinchón, José Antonio

AU - González, Carlos

AU - Herrera, Ramón

PY - 2020/4/1

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N2 - 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.

AB - 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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KW - Cosmology

KW - General relativity

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JO - General Relativity and Gravitation

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M1 - 35

ER -

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

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Keywords

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