2004/12/31 by Viviana Acquaviva, Carlo Baccigalupi, S. Leach +4 · 1 citation
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #CMB cold spot #Cosmic microwave background #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Mathematical analysis #Mathematical physics #Mathematics #Omega #Parametrization (atmospheric modeling) #Physics #Quantum mechanics #Upper and lower bounds #astro-ph #gr-qc
paper · pdf · doi:10.1103/physrevd.71.104025
published as Phys.Rev. D71 (2005) 104025 · 6 pages, 5 figures, RevTeX. Updated to match version accepted by PRD. Significant updates. Headline constraint tightened to omega > 120 (95% conf) by improved statistical analysis
arxiv created 2005/05/09 · openalex publication_date 2005/05/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use cosmic microwave background data from WMAP, ACBAR, VSA and CBI, and galaxy power spectrum data from 2dF, to constrain flat cosmologies based on the Jordan-Brans-Dicke theory, using a Markov chain Monte Carlo approach. Using a parametrization based on \ensuremathξ=1/4\ensuremathω, and performing an exploration in the range ln\ensuremathξ\ensuremath∈[\ensuremath-9,3], we obtain a 95% marginalized probability bound of ln\ensuremathξ<\ensuremath-6.2, corresponding to a 95% marginalized probability lower bound on the Brans-Dicke parameter \ensuremathω>120.