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arXiv 0908.0606gr-qc
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非平坦Brans-Dicke宇宙学中的相互作用新年龄暗能量

Interacting new agegraphic dark energy in non-flat Brans-Dicke cosmology

Ahmad Sheykhi

备注：
9 pages. The version to appear in Phys. Rev. D
发表信息：
Phys. Rev. D 81, 023525 (2010)
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摘要：

在Brans-Dicke宇宙学框架下，将新的年龄记暗能量模型中的新的年龄记能量密度$ρ_{D}= 3n^2 m^2_p /η^{2}$替换为$ρ_{D}= {3n^2ϕ^2}/({4ωη^2}$，建立了一个晚期加速的宇宙学模型.我们证明了Brans-Dicke场和年龄暗能量的结合可以容纳\textit{noninteracting}暗能量状态方程的$w_D = -1 $穿越。当考虑到暗能量和暗物质之间的相互作用时，$w_D $向幻影态的转变比采用爱因斯坦场方程更容易解释。在极限情形$α= 0$ $(ω\to \infty)$下，恢复了爱因斯坦引力中新年龄暗能量的所有结果.

英文摘要：

We construct a cosmological model of late acceleration based on the new agegraphic dark energy model in the framework of Brans-Dicke cosmology where the new agegraphic energy density $ρ_{D}= 3n^2 m^2_p /η^{2}$ is replaced with $ρ_{D}= {3n^2ϕ^2}/({4ωη^2}$). We show that the combination of Brans-Dicke field and agegraphic dark energy can accommodate $w_D = -1 $ crossing for the equation of state of \textit{noninteracting} dark energy. When an interaction between dark energy and dark matter is taken into account, the transition of $w_D $ to phantom regime can be more easily accounted for than when resort to the Einstein field equations is made. In the limiting case $α= 0$ $(ω\to \infty)$, all previous results of the new agegraphic dark energy in Einstein gravity are restored.

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