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

E. P.B.A. Thushari, R. Nakamura, M. Hashimoto, K. Arai

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We investigated the Brans-Dicke model with a variable cosmological term (BDδ) with the coupling constant w = 104. We constrained the parameters inherent in this model from a comparison between the Big Bang nucleosynthesis and the observed abundances. Furthermore, we studied the magnitude redshift (m-z) relations for the BDË with and without another constant cosmological term in a flat universe. Observational data of type Ia supernovae (SNIa) are used in the redshift range of 0.01 <z <2. We found that our model with an energy density of the constant cosmological term of 0.7 can explain the SNIa observations, though the model parameters are insensitive to the m-z relation.

Original languageEnglish
Article numberA52
JournalAstronomy and Astrophysics
Volume521
Issue number6
DOIs
Publication statusPublished - Oct 20 2010

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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