A model with interaction of dark components and recent observational data

TL;DR

This paper explores cosmological models where dark energy and dark matter interact, analyzing solutions for different equations of state and testing them against current observational data to compare with standard models.

Contribution

It introduces and analyzes a new interacting dark energy-dark matter model with variable and constant equations of state, tested against recent observational data.

Findings

Interacting models fit observational data well

Some variants outperform non-interacting models

Statistical comparison favors certain interaction scenarios

Abstract

In the proposed model with interaction between dark energy and dark matter, we consider cosmological scenarios with different equations of state ($w_d$) for dark energy. For both constant and variable equation of state, we analyze solutions for dark energy and dark matter in seven variants of the model. We investigate exact analytic solutions for $w_d={}$ constant equation of state, and several variants of the model for variable $w_d$. These scenarios are tested with the current astronomical data from Type Ia Supernovae, baryon acoustic oscillations, Hubble parameter $H (z)$ and the cosmic microwave background radiation. Finally, we make a statistical comparison of our interacting model with $\Lambda$CDM as well as with some other well known non-interacting cosmological models.