Variable Chaplygin Gas: Constraints from Supernovae, BAO, Look Back Time, and GRBs

TL;DR

This paper constrains the variable Chaplygin gas model using multiple cosmological observations including supernovae, BAO, lookback time, and GRBs to better understand its viability as a dark energy candidate.

Contribution

It provides new tight constraints on the variable Chaplygin gas model parameters using diverse observational data sets.

Findings

Parameter constraints consistent with observational data

Viability of VCG as dark energy model supported

Improved bounds on model parameters

Abstract

We examine the variable Chaplygin gas (VCG) model with the aim of establishing tight constraints by using type-Ia supernovae, lookback time measurements, Baryon Acoustic Oscillations (BAO) and the Gamma Ray Bursts. We report the parameter constraints obtained via statistical analysis of cosmic observables namely, luminosity distance, BAO distance and lookback time measurement