Cosmological models for f (R, T) - A(φ) gravity

被引：5

作者：

Santos, Joao R. L. ^{[1
]}

da Costa, S. Santos ^{[2
]}

Santos, Romario S. ^{[3
]}

机构：

[1] Univ Fed Campina Grande, Unidade Acad Fis, Caixa Postal 10071, BR-58429900 Campina Grande, Paraiba, Brazil

[2] Ist Nazl Fis Nucl INFN, Sez Pisa, Largo B Pontecorvo 3, I-56127 Pisa, Italy

[3] Univ Fed Campina Grande, Dept Engn Proc, Caixa Postal 10071, BR-58429900 Campina Grande, Paraiba, Brazil

来源：

PHYSICS OF THE DARK UNIVERSE | 2023年 / 42卷

关键词：

Dark energy; Accelerated expansion; Cosmological parameters; Scalar fields; f(R; T); A(phi); 1ST-ORDER FORMALISM; DECAYING VACUUM; CONSTANT; SCENARIO; ENERGY; F(R;

D O I：

10.1016/j.dark.2023.101356

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Universe is currently in a phase of accelerated expansion, a fact that was experimentally proven in the late 1990s. Cosmological models involving scalar fields allow the description of this accelerated expansion regime in the Cosmos and present themselves as a promising alternative in the study of the inflationary eras, especially the actual one which is driven by the dark energy. In this work we use the f (R, T) - A(phi) gravity to find different cosmological scenarios for our Universe. We also introduce a new path to derive analytic cosmological models which may have a non-trivial mapping between f and T. We show that the analytic cosmological models obtained with this approach are compatible with a good description of the radiation era. In addition, we investigated the inflationary scenario and obtained a good agreement for the scalar spectral index ns. Concerning the tensor-to-scalar ratio r, we found promising scenarios compatible with current CMB data.

引用

页数：9

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