In this article, an anisotropic Locally Rotationally Symmetric (LRS) Bianchi type I metric in the presence of cloud string fluid and zero mass scalar field in reference to f (R) gravity have been investigated. To obtain the deterministic solutions we assumed the weak field limit for a point-like source f (R) = R^3/2 and the very well-known expansion-shear scalar proportionality relation. Furthermore, some physical and kinematical parameters have been calculated to study the astrophysical consequences of obtained model, which shows a good resemblance to the recent observational data.

中文翻译：

---

f(R) 引力下零质量标量场的平面对称弦宇宙学模型

在本文中，研究了存在云弦流体和参考f ( R ) 重力的零质量标量场的各向异性局部旋转对称 (LRS) Bianchi I 型度量。为了获得确定性解，我们假设点状源f ( R ) = R ^3/2的弱场极限以及众所周知的膨胀剪切标量比例关系。此外，还计算了一些物理和运动学参数来研究所获得模型的天体物理后果，该模型与最近的观测数据非常相似。