Solar system constraints on Gauss-Bonnet mediated dark energy

• Verfasst von: Amendola, Luca [VerfasserIn]
• Verfasst von: Charmousis, Christos [VerfasserIn]
• Verfasst von: Davis, Stephen C. [VerfasserIn]
• Titel: Solar system constraints on Gauss-Bonnet mediated dark energy
• Verf.angabe: Luca Amendola, Christos Charmousis and Stephen C. Davis
• E-Jahr: 2007
• Jahr: 5 October 2007
• Umfang: 13 S.
• Fussnoten: Gesehen am 15.11.2017
• Titel Quelle: Enthalten in: Journal of cosmology and astroparticle physics
• Ort Quelle: London : IOP, 2003
• Jahr Quelle: 2007
• Band/Heft Quelle: (2007), 10, Artikel-ID 004, Seite 1-13
• ISSN Quelle: 1475-7516
• DOI: doi:10.1088/1475-7516/2007/10/004
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565364317

Abstract

Although the Gauss-Bonnet term is a topological invariant for general relativity, it couples naturally to a quintessence scalar field, modifying gravity at solar system scales. We determine the solar system constraints due to this term by evaluating the post-Newtonian metric for a distributional source. We find a mass-dependent, 1/ r 7 correction to the Newtonian potential, and also deviations from the Einstein gravity prediction for light-bending. We constrain the parameters of the theory using planetary orbits, the Cassini spacecraft data, and a laboratory test of Newton's law, always finding extremely tight bounds on the energy associated to the Gauss-Bonnet term. We discuss the relevance of these constraints to late-time cosmological acceleration.