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Higher dimensional Bianchi type-III string cosmological models with dark energy in Brans-Dicke scalar-tensor theory of gravitation
New Astronomy ( IF 2 ) Pub Date : 2021-07-16 , DOI: 10.1016/j.newast.2021.101658
Diksha Trivedi 1 , A.K. Bhabor 1
Affiliation  

The Five dimensional anisotropic Bianchi type-III cosmological model has been investigated within the framework of Brans-Dicke (Phys. Rev. 124:925, 1961) scalar-tensor theory of gravitation. Dark Energy fluid and cosmic strings are considered as a source of energy-matter field and minimal interacting. To determine the solutions of field equations we have used Berman’s special law of variation, power law relation between scalar field ϕ and average scale factor a and proportionality between scalar expansion and shear scalar. It gives two model of the universe i.e. power law model and exponential model. Physicals and kinematical parameters of the model are also discussed for both the scenarios.



中文翻译:

万有引力的 Brans-Dicke 标量张量理论中具有暗能量的高维 Bianchi III 型弦宇宙学模型

在 Brans-Dicke (Phys. Rev. 124:925, 1961) 引力标量张量理论的框架内研究了五维各向异性 Bianchi III 型宇宙学模型。暗能量流体和宇宙弦被认为是能量-物质场和最小相互作用的来源。为了确定场方程的解,我们使用了伯曼的特殊变分定律,标量场之间的幂律关系φ 和平均比例因子 一种以及标量膨胀和剪切标量之间的比例。它给出了两种宇宙模型,即幂律模型和指数模型。还针对这两种情况讨论了模型的物理和运动学参数。

更新日期:2021-07-19
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