Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-04-05
Mod.Phys.Lett. A20 (2005) 1443-1450
Astronomy and Astrophysics
Astrophysics
7 pages, 3 figures, ws-mpla.cls, accepted by MPLA
Scientific paper
10.1142/S0217732305016877
We assume that dark matter and dark energy satisfy the unified equation of state: $p=B(z)\rho$, with $p=p_{dE}$, $\rho=\rho_{dm}+\rho_{dE}$, where the pressure of dark matter $p_{dm}=0$ has been taken into account. A special function $B=-\frac{A}{(1+z)^{\alpha}}$ is presented, which can well describe the evolution of the universe. In this model, the universe will end up with a Big Rip. By further simple analysis, we know other choices of the function $B$ can also describe the universe but lead to a different doomsday.
Gui Yuan-Xing
Guo Guanghai
Shao Ying
Wang Wei
Zhang Suhong
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