Avsajanishvili, O.; Chitov, G.Y.; Kahniashvili, T.; Mandal, S.; Samushia, L. Observational Constraints on Dynamical Dark Energy Models. Universe2024, 10, 122.
Avsajanishvili, O.; Chitov, G.Y.; Kahniashvili, T.; Mandal, S.; Samushia, L. Observational Constraints on Dynamical Dark Energy Models. Universe 2024, 10, 122.
Avsajanishvili, O.; Chitov, G.Y.; Kahniashvili, T.; Mandal, S.; Samushia, L. Observational Constraints on Dynamical Dark Energy Models. Universe2024, 10, 122.
Avsajanishvili, O.; Chitov, G.Y.; Kahniashvili, T.; Mandal, S.; Samushia, L. Observational Constraints on Dynamical Dark Energy Models. Universe 2024, 10, 122.
Abstract
$\phi$CDM models provide an alternative to the standard $\Lambda$CDM paradigm, while being physically better motivated. These models lead to a time-dependent speed of sound for dark energy that is difficult to replicate by $w$CDM parametrizations.
We review the most up-to-date status of observational evidence for the $\phi$CDM models in this paper.
We start with an overview of the motivation behind these classes of models, the basic mathematical formalism, and the different classes of models.
We then present a compilation of recent results of applying different observational probes to constraining $\phi$CDM model parameters.
Over the last twenty years, the precision of observational data has increased immensely, leading to ever tighter constraints.
A combination of the recent measurements favors the spatially flat $\Lambda$CDM model, but a large class of $\phi$CDM models is still not ruled out.
Keywords
Dark energy; observational data; dynamical dark energy models
Subject
Physical Sciences, Astronomy and Astrophysics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
