Fitting Non-Minimally Coupled Scalar Models to Gold SnIa Dataset

Details Fitting Non-Minimally Coupled Scalar Models to Gold SnIa Dataset Fitting Non-Minimally Coupled Scalar Models to Gold SnIa Dataset

2005-06-04

arxiv.org/abs/astro-ph/0506093v2

Phys.Lett. B626 (2005) 7-14

Astronomy and Astrophysics

Astrophysics

8 pages, 7 figures, accepted for publication in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2005.08.050

Non-minimally coupled theories of special potentials are analyzed numerically. Such theories yield equations of state $\omega<-1$ 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 $V(\phi)=V_0e^{a_1\phi^2}$ yields $\chi^2_{min}=170.127$. Similar results are obtained for potentials of the form $V(\phi)=V_0+a_1\phi^n$.

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