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arXiv · 0710.0366

Coupling constant constraints in a nonminimally coupled phantom cosmology

Marek Szydlowski·Orest Hrycyna·Aleksandra Kurek
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Abstract

In the paper we investigate observational constraints on coupling to gravity constant parameter $ξ$ using distant supernovae SNIa data, baryon oscillation peak (BOP), the cosmic microwave background radiation (CMBR) shift parameter, and $H(z)$ data set. We estimate the value of this parameter to constrain the extended quintessence models with nonminimally coupled to gravity phantom scalar field. The combined analysis of observational data favors a value of $ξ$ which lies in close neighborhood of the conformal coupling. While our estimations are model dependent they give rise to a indirect bound on the Equivalence Principle.

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Marek Szydlowski, Orest Hrycyna, Aleksandra Kurek. 2008-02-05. Coupling constant constraints in a nonminimally coupled phantom cosmology. https://doi.org/10.1103/physrevd.77.027302

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