Cosmography using strong lensing systems and cosmic chronometers

TL;DR

This paper introduces a new method for cosmography using strong lensing systems and cosmic chronometers, demonstrating its competitiveness and consistency with the standard cosmological model.

Contribution

It presents a novel equation for angular diameter distance in the y-redshift scenario and applies it to constrain cosmographic parameters with new observational data.

Findings

Strong lensing systems effectively constrain cosmographic parameters.

Reconstructed equation of state aligns with the standard cosmological model at z=0.

Joint analysis improves parameter constraints.

Abstract

Using a new sub-sample of observed strong gravitational lens systems, for the first time, we present the equation for the angular diameter distance in the $y$-redshift scenario for cosmography and use it to test the cosmographic parameters. In addition, we also use the observational Hubble data from cosmic chronometers and a Joint analysis of both data is performed. Among the most important conclusions are that this new analysis for cosmography using Strong Lensing Systems is equally competitive to constrain the cosmographic parameters as others presented in literature. Additionally, we present the reconstruction of the effective equation of state inferred from our samples, showing that at $z=0$ those reconstructions from Strong Lensing Systems and Joint analysis are in concordance with the standard model of cosmology.