New Cosmographic Constraints on the Dark Energy and Dark Matter Coupling

TL;DR

This paper derives new constraints on the interaction between dark energy and dark matter using cosmographic parameters, enabling direct observational bounds on the coupling constant.

Contribution

It introduces a method to constrain dark sector coupling constants directly from cosmographic data, reducing model ambiguity.

Findings

Constraints on the dark sector coupling constant derived from observational data.

Restrictions on the number of viable dark sector interaction models.

Application of cosmography to dark energy and dark matter interaction models.

Abstract

We consider three cosmological models with linear interaction between the dark components and obtain restrictions on the coupling constant in terms of the cosmographic parameters. It enables us to find constraints on the coupling constant directly based on observational data and to restrict number of numerous models describing interaction in the dark sector.