Big-bang nucleosynthesis in a Brans-Dicke cosmology with a varying A term related to WMAP

R. Nakamura, M. Hashimoto, S. Gamow, K. Arai

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We investigate the big-bang nucleosynthesis in a Brans-Dicke model with a varying A term using the Monte-Carlo method and likelihood analysis. It is found that the cosmic expansion rate differs appreciably from that of the standard model. The produced abundances of 4He, D, and 7Li are consistent with the observed ones within the uncertainties in nuclear reaction rates when the baryon to photon ratio η = (5.47-6.64) × 10 -10, which is in agreement with the value deduced from WMAP.

Original languageEnglish
Pages (from-to)23-27
Number of pages5
JournalAstronomy and Astrophysics
Volume448
Issue number1
DOIs
Publication statusPublished - Mar 1 2006

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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