Astrophysical and cosmological constraints on a scale-dependent gravitational coupling

Details Astrophysical and cosmological constraints on a scale-dependent gravitational coupling Astrophysical and cosmological constraints on a scale-dependent gravitational coupling

1995-02-02

arxiv.org/abs/astro-ph/9502010v2

Int.J.Mod.Phys.D5:363-374,1996

Astronomy and Astrophysics

Astrophysics

Important revision, new references.

Scientific paper

10.1142/S0218271896000230

We study the phenomenological consequences of the recently proposed idea of a running gravitational coupling on macroscopic scales. When applied to the rotation curves of galaxies, we find that their flatness requires the presence of baryonic dark matter. Bounds on the variation of the gravitational coupling from primordial nucleosynthesis and the change of the period of binary pulsars are analysed. We also study constraints on the variations of $G$ with scale from gravitational lensing and the cosmic virial theorem, as well as briefly discuss the implications of such a scenario for structure formation.

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