Dark energy model with higher derivative of Hubble parameter

Details Dark energy model with higher derivative of Hubble parameter Dark energy model with higher derivative of Hubble parameter

2009-04-20

arxiv.org/abs/0904.2950v4

Phys. Lett. B 679 (2009) 144-150

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 6 figures, the correct version accepted for publication in PLB

Scientific paper

In this letter we consider a dark energy model in which the energy density is a function of the Hubble parameter $H$ and its derivative with respect to time $\rho_{de}=3\alpha \ddot{H}H^{-1}+3\beta\dot{H}+3\gamma H^2$. The behavior of the dark energy and the expansion history of the Universe depend heavily on the parameters of the model $\alpha$, $\beta$ and $\gamma$. It is very interesting that the age problem of the well-known three old objects can be alleviated in this models.

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