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 ξ=1/4ω, and performing an exploration in the range ln(ξ∈[-9,3], we obtain a 95% marginalized probability bound of ln(ξ<-6.2, corresponding to a 95% marginalized probability lower bound on the Brans-Dicke parameter ω>120.
Structure formation constraints on the Jordan-Brans-Dicke theory / Acquaviva, V.; Baccigalupi, C.; Leach, S. M.; Liddle, A. R.; Perrotta, F.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 71:10(2005), pp. 1-6. [10.1103/PhysRevD.71.104025]
Structure formation constraints on the Jordan-Brans-Dicke theory
Baccigalupi C.;Perrotta F.
2005-01-01
Abstract
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 ξ=1/4ω, and performing an exploration in the range ln(ξ∈[-9,3], we obtain a 95% marginalized probability bound of ln(ξ<-6.2, corresponding to a 95% marginalized probability lower bound on the Brans-Dicke parameter ω>120.| File | Dimensione | Formato | |
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