Friedmann Cosmology with Bulk Viscosity: A Concrete Model for Dark Energy

Friedmann Cosmology with Bulk Viscosity: A Concrete Model for Dark Energy
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具有体积粘度的弗里德曼宇宙学:暗能量的具体模型

DOI:
10.1088/0253-6102/52/2/36
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发表时间:
2008-12
影响因子:
3.1
通讯作者:
Dou Xu
Dou Xu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Meng Xin-He;Dou Xu

文献摘要

参考文献

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宇宙含量被认为是具有体粘性的非理想流体,可以用一般的状态方程来描述(与传统假设的宇宙理想流体模型有一定的偏差)。通过统计分析,提出了一个与当前观测数据一致的显体粘性暗能量模型,并通过对减速参数的比较,表明该模型与协调的Λ冷暗物质模型是一致的(没有太大偏离)。我们还比较了我们相对简单的粘性暗能量模型和更复杂的粘性暗能量模型,并与协调的Λ清洁发展机制模型进行了对比,发现我们的模型在粘性暗能量模型的建立上有所改进。最后,我们通过观测讨论了暗能量探测器在未来几年的前景。
The universe content is considered as a non-perfect fluid with bulk viscosity and can be described by a general equation of state (endowed some deviation from the conventionally assumed cosmic perfect fluid model). An explicitly bulk viscosity dark energy model is proposed to confront consistently with the current observational data sets by statistical analysis and is shown consistent with (not deviated away much from) the concordant Λ Cold Dark Matter (CDM) model by comparing the decelerating parameter. Also we compare our relatively simple viscosity dark energy model with a more complicated one by contrast with the concordant Λ CDM model and find our model improves for the viscosity dark energy model building. Finally we discuss the perspectives of dark energy probes for the coming years with observations.
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期刊: Physical Review D
影响因子: 5
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