Cosmology and static spherically symmetric solutions in D-dimensional scalar-tensor theories: Some novel features
- Institute of Mathematical Sciences, CIT Campus, Chennai-600 113 (India)
We consider scalar-tensor theories in D-dimensional spacetime, D{>=}4. They consist of a metric and a nonminimally coupled scalar field, with its nonminimal coupling characterized by a function. The probes couple minimally to the metric only. We obtain vacuum solutions--both cosmological and static spherically symmetric ones--and study their properties. We find that, as seen by the probes, there is no singularity in the cosmological solutions for a class of functions which obey certain constraints. It turns out that for the same class of functions, there are static spherically symmetric solutions which exhibit novel properties: e.g., near the 'horizon', the gravitational force as seen by the probe becomes repulsive.
- OSTI ID:
- 20698031
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 70, Issue 10; Other Information: DOI: 10.1103/PhysRevD.70.104030; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Local effects of cosmological variations in physical 'constants' and scalar fields. I. Spherically symmetric spacetimes
Static spherically symmetric solutions to modified Horava-Lifshitz gravity with a projectability condition