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A panorama of viable F(R) gravity dark energy models.
- Source :
-
International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology . Jul2022, Vol. 31 Issue 9, p1-21. 21p. - Publication Year :
- 2022
-
Abstract
- In this work, we shall study the late-time dynamics of several F(R) gravity models. By appropriately expressing the field equations in terms of the redshift and of a statefinder function, we shall solve numerically the field equations using appropriate physical motivated initial conditions. We consider models which, by construction, are described by a nearly R 2 -model at early epochs and we fine tune the parameters to achieve viability and compatibility with the latest Planck constraints at late times. Such models provide a unified description of inflation and dark energy era and notably a common feature of all the models is the presence of dark energy oscillations. Furthermore, we show that, in contrast to general relativistic fluids and scalar field descriptions, a large spectrum of different dark energy physics is generated by simple F(R) gravity models, varying from phantom, to nearly de Sitter and to quintessential dark energy eras. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02182718
- Volume :
- 31
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology
- Publication Type :
- Academic Journal
- Accession number :
- 158516946
- Full Text :
- https://doi.org/10.1142/S0218271822500754