Fitting Non-Minimally Coupled Scalar Models to Gold SnIa Dataset
arXiv:astro-ph/0506093 · doi:10.1016/j.physletb.2005.08.050
Abstract
Non-minimally coupled theories of special potentials are analyzed numerically. Such theories yield equations of state $Ï<-1$ and oscillations of the cosmological expansion, which are favored by the recent analysis of observations. Fitting these theories to the Gold SnIa dataset, we obtain results comparable with other models. A potential of the form $V(Ï)=V_0e^{a_1Ï^2}$ yields $Ï^2_{min}=170.127$. Similar results are obtained for potentials of the form $V(Ï)=V_0+a_1Ï^n$.
8 pages, 7 figures, accepted for publication in Phys. Lett. B