Upper Limit to ΩBin Scalar‐Tensor Gravity Theories | Zendy

JeanMichel Alimi | Zendy; A. Serna | Zendy

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Upper Limit to Ω_Bin Scalar‐Tensor Gravity Theories

Author(s) -

JeanMichel Alimi,

A. Serna

Publication year - 1997

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/304613

Subject(s) - physics , big bang nucleosynthesis , general relativity , nucleosynthesis , baryon , theoretical physics , pulsar , scalar (mathematics) , binary pulsar , cosmology , gravitation , universe , astrophysics , particle physics , classical mechanics , supernova , geometry , mathematics , millisecond pulsar

In a previous paper (Serna & Alimi 1996), we have pointed out the existenceof some particular scalar-tensor gravity theories able to relax thenucleosynthesis constraint on the cosmic baryonic density. In this paper, wepresent an exhaustive study of primordial nucleosynthesis in the framework ofsuch theories taking into account the currently adopted observationalconstraints. We show that a wide class of them allows for a baryonic densityvery close to that needed for the universe closure. This class of theoriesconverges soon enough towards General Relativity and, hence, is compatible withall solar-system and binary pulsar gravitational tests. In other words, we showthat primordial nucleosynthesis does not always impose a very stringent boundon the baryon contribution to the density parameter.Comment: uuencoded tar-file containing 16 pages, latex with 5 figures, accepted for publication in Astrophysical Journal (Part 1

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