Observational constraints on holographic dark energy with varying gravitational constant

2009/12/31 by Jianbo Lu, Emmanuel N. Saridakis, M. R. Setare +1 · 1 citation
Physics and Astronomy · #astro-ph.CO #gr-qc #hep-th

paper · pdf · doi:10.1088/1475-7516/2010/03/031

published as JCAP 1003:031,2010 · 12 pages, 2 figures, version published in JCAP

arxiv created 2010/03/31 · arxiv updated 2015/03/13

Abstract

We use observational data from Type Ia Supernovae (SN), Baryon Acoustic Oscillations (BAO), Cosmic Microwave Background (CMB) and observational Hubble data (OHD), and the Markov Chain Monte Carlo (MCMC) method, to constrain the cosmological scenario of holographic dark energy with varying gravitational constant. We consider both flat and non-flat background geometry, and we present the corresponding constraints and contour-plots of the model parameters. We conclude that the scenario is compatible with observations. In 1σ we find Ω_Λ0=0.72^+0.03_-0.03, Ω_k0=-0.0013^+0.0130_-0.0040, c=0.80^+0.19_-0.14 and Δ_G≡ G'/G=-0.0025^+0.0080_-0.0050, while for the present value of the dark energy equation-of-state parameter we obtain w₀=-1.04^+0.15_-0.20.

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