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Reconstruction and Exact Solutions for Cosmological Perturbations from a Generalized Gravity Theory by Belinchón, José Antonio; González, Carlos; Herrera, Ramón is a Physics and Astronomy article available to read on EtoBox.

What is Reconstruction and Exact Solutions for Cosmological Perturbations from a Generalized Gravity Theory about?

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.

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Author

Belinchón, José Antonio; González, Carlos; Herrera, Ramón

Publisher

Springer US; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0001-7701)

Published

2020

Language

EN

Field

Physics and Astronomy (Physical Sciences)