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arXiv 1004.3370astro-ph.CO
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从参数化减速参数重建暗能量势

Reconstructing Dark Energy Potentials From Parameterized Deceleration Parameters

Yuting Wang, Lixin Xu, Jianbo Lu, Yuan-Xing Gui

摘要:

根据描述宇宙加速膨胀程度的减速参数$q(z)$,研究了暗能量的性质。将暗能量$V(ϕ)$的势能与无量纲能量密度$Ω_ϕ$、$Ω_{m}$、状态参数$w_ϕ$等宇宙学参数联系起来,通过给出两种参数化的减速参数$q(z)=a+\frac{bz}{1+z}$和$q(z)=1/2+\frac{az+b}{(1+z)^2}$,绘制并分析了这些参数的演化和重构势能$V(ϕ)$.研究发现,随着宇宙的演化,势函数也在不断地变化。

英文摘要:

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 $V(ϕ)$ and the cosmological parameters, such as the dimensionless energy density $Ω_ϕ$, $Ω_{m}$, and the state parameter $w_ϕ$, 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 $V(ϕ)$ are plotted and analyzed. It's found that the potentials run away with the evolution of universe.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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