Curvature of the universe and the dark energy potential

Details Curvature of the universe and the dark energy potential Curvature of the universe and the dark energy potential

2002-11-20

arxiv.org/abs/gr-qc/0211068v2

Phys.Rev. D66 (2002) 123513

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

References 7 and 8 have been corrected: (7) Riess et al. 1998, AJ, 116, 1009 and (8) Perlmutter et al. 1999, ApJ, 517, 565

Scientific paper

10.1103/PhysRevD.66.123513

The flatness of an accelerating universe model (characterized by a dark energy scalar field $\chi$) is mimicked from a curved model that is filled with, apart from the cold dark matter component, a quintessencelike scalar field $Q$. In this process, we characterize the original scalar potential $V(Q)$ and the mimicked scalar potential $V(\chi)$ associated to the scalar fields $Q$ and $\chi$, respectively. The parameters of the original model are fixed through the mimicked quantities that we relate to the present astronomical data, such that the equation state parameter $w_{_{\chi}}$ and the dark energy density parameter $\Omega_{\chi}$.

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