Combined constraints on modified Chaplygin gas model from cosmological observed data: Markov Chain Monte Carlo approach

2010/10/14 by Jianbo Lu, Lixin Xu, Yabo Wu +1 · 54 citations
Physics and Astronomy · #Baryon acoustic oscillations #Chaplygin gas #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Galaxies: Formation, Evolution, Phenomena #Hubble's law #Markov chain Monte Carlo #Monte Carlo method #Statistical Mechanics and Entropy #astro-ph.CO

paper · pdf · doi:10.1007/s10714-010-1103-4

published in General Relativity and Gravitation 43(3), 819-832 (Springer Science+Business Media) · 12 pages, 1figure

openalex publication_date 2010/10/14 · arxiv created 2011/05/10 · arxiv updated 2011/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We use the Markov Chain Monte Carlo method to investigate a global constraints on the modified Chaplygin gas (MCG) model as the unification of dark matter and dark energy from the latest observational data: the Union2 dataset of type supernovae Ia (SNIa), the observational Hubble data (OHD), the cluster X-ray gas mass fraction, the baryon acoustic oscillation (BAO), and the cosmic microwave background (CMB) data. In a flat universe, the constraint results for MCG model are, Ω_bh²=0.02263^+0.00184_-0.00162 (1σ) ^+0.00213_-0.00195 (2σ), B_s=0.7788^+0.0736_-0.0723 (1σ) ^+0.0918_-0.0904 (2σ), α=0.1079^+0.3397_-0.2539 (1σ) ^+0.4678_-0.2911 (2σ), B=0.00189^+0.00583_-0.00756 (1σ) ^+0.00660_-0.00915 (2σ), and H₀=70.711^+4.188_-3.142 (1σ) ^+5.281_-4.149 (2σ).

Citations

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant

Cited by

• In the Realm of the Hubble tension - a Review of Solutions
• Observational analysis of bulk viscous modified Chaplygin gas in (2+1)-dimensional universe using MCMC

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