Observational constraint in FRW cosmology with a nonminimal scalar field-matter coupling

TL;DR

This paper investigates a cosmological model with a nonminimally coupled scalar field and matter in FRW universe, using observational data to constrain parameters and analyze the universe's dynamics, including phantom crossing behavior.

Contribution

It introduces a model with scalar field-matter coupling in FRW cosmology and constrains its parameters using observational data, revealing unique phantom crossing features.

Findings

Phantom crossing occurs twice in the past and once in the future for flat universe.

No phantom crossing occurs in open and closed universe models.

Model parameters are constrained by observational data.

Abstract

In this paper within the scope of FRW cosmology for k = 0, \pm1 we study the dynamics of the universe for a cosmological model with a scalar field nonminimally coupled to matter. By best- fitting the model parameters with the observational data for the direct interaction between the dark sectors in the model we obtain observational constraints on cosmological parameters. The result shows that with the best fitted model parameters, only in flat universe, the phantom crossing occurs twice in the past and once in the future, whereas no crossing occurs for open and closed models of the universe.