Brans-Dicke model constrained from Big Bang nucleosynthesis and magnitude redshift relations of Supernovae

Abstract

The Brans-Dicke model with a variable cosmological term ($BD\Lambda$) has been investigated with use of the coupling constant of $\omega =10^4$. Parameters inherent in this model are constrained from comparison between Big Bang nucleosynthesis and the observed abundances. Furthermore, the magnitude redshift ($m-z$) relations are studied for $BD\Lambda$ with and without another constant cosmological term in a flat universe. Observational data of Type Ia Supernovae are used in the redshift range of $0.01<z<2$. It is found that our model with energy density of the constant cosmological term with the value of 0.7 can explain the SNIa observations, though the model parameters are insensitive to the $m-z$ relation.

Submitted to A&A, 4 pages, 3 figures

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• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
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Cited by in corpus (3)

• Big-Bang nucleosynthyesis: constraints on nuclear reaction rates, neutrino degeneracy, inhomogeneous and Brans-Dicke models
• Big-Bang Nucleosynthesis in comparison with observed helium and deuterium abundances - possibility of a non-standard model
• Electrostatic Potential of a Point Charge in a Brans-Dicke Reissner-Nordstrom Field