Eur. Phys. J. Plus (2019) 134: 354
https://doi.org/10.1140/epjp/i2019-12701-4

Regular Article

Model comparison using supernovae and Hubble parameter data

¹ Centro de Astrofísica e Gravitação, Instituto Superior Técnico-IST, Universidade de Lisboa-UL, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
² Instituto de Física, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2950, Casilla, 4059, Valparaso, Chile

^* e-mail: angel.rincon@pucv.cl

Received: 3 September 2018
Accepted: 24 April 2019
Published online: 25 July 2019

Abstract

We compare several well-known cosmological dark-energy models using observational data coming both from type-Ia supernovae and from Hubble parameter measurements. First we use supernovae data to determine the free parameters of each model except for the Hubble constant H₀. Then, we use the Hubble parameter measurements to determine H₀, and finally the age of the Universe for each model is computed. Our main numerical results are summarized in tables, and they are briefly discussed. The prediction for the decelerating parameter as a function of red-shift for each model is shown in the same figure for comparison. Our numerical results seem to indicate a correlation between the deceleration parameter and the value of the Hubble constant.