Structure formation constraints on the Jordan-Brans-Dicke theory

Details Structure formation constraints on the Jordan-Brans-Dicke theory Structure formation constraints on the Jordan-Brans-Dicke theory

2004-12-02

arxiv.org/abs/astro-ph/0412052v2

Phys.Rev. D71 (2005) 104025

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures, RevTeX. Updated to match version accepted by PRD. Significant updates. Headline constraint tightened to om

Scientific paper

10.1103/PhysRevD.71.104025

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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