Fitting cosmological data to the function $q(z)$ from GR Theory: Modified Chaplygin Gas

Alan M. Velásquez-Toribio, Maria Luíza Bedran

In the Friedmann cosmology the deceleration of the expansion $q$ plays a fundamental role. We derive the deceleration as a function of redshift $q(z)$ in two scenarios: $\Lambda$CDM mode…