Status on bidimensional dark energy parameterizations using SNe Ia JLA and BAO datasets

2016/05/31 by Celia Escamilla-Rivera · 2 citations
Physics and Astronomy · #astro-ph.CO #gr-qc

paper · pdf · doi:10.3390/galaxies4030008

published as Galaxies 2016, 4(3), 8 · 14 pages, 2 figures

arxiv created 2016/08/12 · arxiv updated 2016/08/15

Abstract

Using current observations forecast type Ia supernovae (SNe Ia) Joint Lightcurve Analysis (JLA) and baryon acoustic oscillations (BAO), in this paper we investigate six bidimensional dark energy parameterisations in order to explore which has more constraining power. Our results indicate that for parameterisations that contain z²-terms, the tension (σ-distance) between these datasets seems to be reduced and their behaviour are <1σ compatible with ΛCDM. Also, the results obtained by performing their Bayesian evidence show a striking evidence in favour of the ΛCDM model, but only one parameterisation can be distinguish by around 1% from the other models when the combination of datasets are considered.

Cited by

• Alleviating the Hubble Tension with Logarithmic Dark Energy: Constraints on the w_logCDM Model
• Observational Constraints and Geometric Diagnostics of Barboza-Alcaniz and Logarithmic Dark Energy Parametrizations