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arXiv 0708.0680gr-qc
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$Λ$ - CDM宇宙:一种具有多种可能性的唯象方法

$Λ$-CDM Universe: A Phenomenological Approach With Many Possibilities

U. Mukhopadhyay, Saibal Ray, S. B. Dutta Choudhury

摘要:

本文选取了一个含时唯象模型$\dot Λ\sim H^3$来研究$Λ$ -CDM宇宙学。导出了状态方程参数$ω$的时间依赖形式,并得到了所寻求的减速参数q的符号翻转。对于某些特定的参数值,计算出的宇宙年龄与观测数据非常吻合。

英文摘要:

A time-dependent phenomenological model of $Λ$, viz. $\dot Λ\sim H^3$ is selected to investigate the $Λ$-CDM cosmology. Time-dependent form of the equation of state parameter $ω$ is derived and it has been possible to obtain the sought for flip of sign of the deceleration parameter q. Present age of the Universe, calculated for some specific values of the parameters agrees very well with the observational data.

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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