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2009-12-30 - Article/Dans un journal avec peer-review - Anglais - 18 page(s)

Brihaye Yves , Verbin Y., "Spherical Structures in Conformal Gravity and its Scalar-Tensor Extension" in Physical Review. D : Particles and Fields, 80, 12, 124048-124065

  • Edition : American Physical Society, College Park (MD)
  • Codes CREF : Physique des particules élémentaires (DI1221), Physique théorique et mathématique (DI1210)
  • Unités de recherche UMONS : Physique théorique et mathématique (S814)
Texte intégral :

Abstract(s) :

(Anglais) We study spherically symmetric structures in conformal gravity and in a scalar-tensor extension and gain some more insight about these gravitational theories. In both cases we analyze solutions in two systems: perfect fluid solutions and boson stars of a self-interacting complex scalar field. In the purely tensorial (original) theory we find in a certain domain of parameter space finite mass solutions with a linear gravitational potential but without a Newtonian contribution. The scalar-tensor theory exhibits a very rich structure of solutions whose main properties are discussed. Among them, solutions with a finite radial extension, open solutions with a linear potential and logarithmic modifications and also a (scalar-tensor) gravitational soliton. This may also be viewed as a static self-gravitating boson star in purely tensorial conformal gravity.

Notes :
  • (Anglais) e-print: 0907.1951
Identifiants :
  • DOI : 10.1103/PhysRevD.80.124048