用Brans-Dicke引力理论中最近的H（z）和BAO观测约束Bianchi V型宇宙
Constraining Bianchi type V universe with recent H(z) and BAO observations in Brans-Dicke theory of gravitation
摘要：
本文研究了Brans-Dicke引力理论中Bianchi V型宇宙的跃迁模型。导出的模型不仅验证了马赫原理，而且描述了宇宙的当前加速度。本文的目的是在Brans-Dicke引力中约束一个精确的Bianchi V型宇宙.为此，我们首先得到了修正引力场中场方程的精确解，然后用最近的$H(z)$和重子声学振荡（BAO）观测数据约束模型参数。宇宙加速膨胀的当前阶段也被描述为来自宇宙学常数屏蔽标量场的贡献，减速参数显示出约$z_{t} = 0.79$的跃迁红移。还讨论了宇宙的一些物理性质。
英文摘要：
In this paper, we investigate a transitioning model of Bianchi type V universe in Brans-Dicke theory of gravitation. The derived model not only validates Mach's principle but also describes the present acceleration of the universe. In this paper, our aim is to constrain an exact Bianchi type V universe in Brans - Dicke gravity. For this sake, firstly we obtain an exact solution of field equations in modified gravity and secondly constrain the model parameters by bounding the model with recent $H(z)$ and Baryon acoustic oscillations (BAO) observational data. The current phase of accelerated expansion of the universe is also described by the contribution coming from cosmological constant screened scalar field with deceleration parameter showing a transition redshift of about $z_{t} = 0.79$. Some physical properties of the universe are also discussed.
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