Reconstructing Dark Energy Potentials From Parameterized Deceleration Parameters

Details Reconstructing Dark Energy Potentials From Parameterized Deceleration Parameters Reconstructing Dark Energy Potentials From Parameterized Deceleration Parameters

2010-04-20

arxiv.org/abs/1004.3370v1

Chin. Phys. B Vol.19, No.1 (2010) 019801

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Scientific paper

In this paper, the properties of dark energy are investigated according to the parameterized deceleration parameter $q(z)$, which is used to describe the extent of the accelerating expansion of the universe. The potential of dark energy $V(\phi)$ and the cosmological parameters, such as the dimensionless energy density $\Omega_{\phi}$, $\Omega_{m}$, and the state parameter $w_\phi$, are connected to it. Concretely, by giving two kinds of parameterized deceleration parameters $q(z)=a+\frac{bz}{1+z}$ and $q(z)=1/2+\frac{az+b}{(1+z)^2}$, the evolution of these parameters and the reconstructed potentials $V(\phi)$ are plotted and analyzed. It's found that the potentials run away with the evolution of universe.

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