Generalized models of unification of dark matter and dark energy

被引：14

作者：

Caplar, Neven ^{[1
]}

Stefancic, Hrvoje ^{[1
]}

机构：

[1] Rudjer Boskovic Inst, Div Theoret Phys, HR-10002 Zagreb, Croatia

来源：

PHYSICAL REVIEW D | 2013年 / 87卷 / 02期

关键词：

CHAPLYGIN-GAS MODEL; PROBE WMAP OBSERVATIONS; CONSTRAINTS; UNIVERSE; SUPERNOVAE; PARAMETER;

D O I：

10.1103/PhysRevD.87.023510

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

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) = alpha(-w)(gamma), 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. DOI: 10.1103/PhysRevD.87.023510

引用

页数：8

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