Coupling constant constraints in a nonminimally coupled phantom cosmology

Autor:	Szydlowski, Marek, Hrycyna, Orest, Kurek, Aleksandra
Rok vydání:	2007
Předmět:	Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory
Zdroj:	Phys.Rev.D77:027302,2008
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.77.027302
Popis:	In the paper we investigate observational constraints on coupling to gravity constant parameter $\xi$ 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 $\xi$ 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. Comment: revtex4, 11 pages, 3 figs; (v2) 4 pages, shortened version, title changed, comments added on the Equivalence Principle; (v3) published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0710.0366 Zobrazit plný text záznamu View this record from Arxiv