arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1208.0449astro-ph.COgr-qchep-ph
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暗物质和暗能量统一的广义模型

Generalized models of unification of dark matter and dark energy

Neven Caplar, Hrvoje Stefancic

摘要:

介绍了一种基于声速与状态方程参数关系的暗物质和暗能量统一模型。发现声速依赖于状态方程参数的幂次的模型$c_s^2=α(-w)^γ$包含广义Chaubergin气体模型作为它的子类。一个有效的标量场描述的模型中获得的参数形式,在某些情况下,可以转化为一个封闭的形式解决方案的标量场潜力。利用不同红移下哈勃参数的观测数据,得到了模型参数的约束条件。

英文摘要:

A model of unification of dark matter and dark energy based on the modeling of the speed of sound as a function of the parameter of the equation of state is introduced. It is found that the model in which the speed of sound depends on the power of the parameter of the equation of state, $c_s^2=α(-w)^γ$, contains the generalized Chaplygin gas models as its subclass. An effective scalar field description of the model is obtained in a parametric form which in some cases can be translated into a closed form solution for the scalar field potential. A constraint on model parameters is obtained using the observational data on the Hubble parameter at different redshifts.

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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