TY - JOUR
T1 - Reconstruction and exact solutions for cosmological perturbations from a generalized gravity theory
AU - Belinchón, José Antonio
AU - González, Carlos
AU - HERRERA APABLAZA, RAMON ALEJANDRO
N1 - Publisher Copyright:
© 2020, Springer Science+Business Media, LLC, part of Springer Nature.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/4/1
Y1 - 2020/4/1
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.
KW - Cosmolgy perturbations theory
KW - Cosmology
KW - General relativity
UR - http://www.scopus.com/inward/record.url?scp=85083379655&partnerID=8YFLogxK
U2 - 10.1007/s10714-020-02685-z
DO - 10.1007/s10714-020-02685-z
M3 - Article
AN - SCOPUS:85083379655
VL - 52
JO - General Relativity and Gravitation
JF - General Relativity and Gravitation
SN - 0001-7701
IS - 4
M1 - 35
ER -