Constraints on Dark Energy and Modified Gravity models by the Cosmological Redshift Drift test

TL;DR

This paper investigates how the cosmological redshift drift test can constrain different models explaining the universe's acceleration, including both General Relativity and modified gravity theories.

Contribution

It provides a comparative analysis of constraints on accelerating universe models using the redshift drift test within GR and beyond GR frameworks.

Findings

Redshift drift test effectively constrains dark energy models.

Modified gravity models show distinct signatures in redshift evolution.

The method offers a direct probe of the universe's expansion history.

Abstract

We study cosmological constraints on the various accelerating models of the universe using the time evolution of the cosmological redshift of distant sources. The important characteristic of this test is that it directly probes the expansion history of the universe. In this work we analyze the various models of the universe which can explain the late time acceleration, within the framework of General Theory of Relativity (GR) (XCDM, scalar field potentials) and beyond GR (f(R) gravity model).