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arxiv: astro-ph/0412052 · v2 · pith:ZC74TMJ4 · submitted 2004-12-02 · astro-ph · gr-qc

Structure formation constraints on the Jordan-Brans-Dicke theory

Viviana Acquaviva , Carlo Baccigalupi , Samuel M. Leach , Andrew R. Liddle , Francesca Perrotta This is my paper

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keywords bounddatajordan-brans-dickemarginalizedomegaprobabilitytheoryacbar
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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 \xi=1/4\omega, and performing an exploration in the range \ln\xi \in [-9,3], we obtain a 95% marginalized probability bound of \ln\xi < -6.2, corresponding to a 95% marginalized probability lower bound on the Brans-Dicke parameter \omega>120.

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