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引用次数: 0
摘要
在本文中,我们使用平面对称 LRS 比安奇 I 型度量来研究 f (R) 引力理论框架内与云串耦合的体粘性流体。为了得到确定性解,我们考虑了一些物理上可行的条件,如点状源的弱场极限 f (R) = R 3/2、众所周知的膨胀剪切标量比例关系和平均尺度因子的特殊形式。此外,我们还计算了一些物理和运动学参数以及能量条件,以研究构建模型的天体物理意义,并讨论了它们的图形行为,这些图形行为与最近的观测数据显示出很好的相似性。
Viscous Plane Symmetric String Cosmological Model in f (R) Gravity
In this paper, we have used the Plane Symmetric LRS Bianchi type I metric to study bulk viscous fluid coupled to a string of clouds within the framework of the f (R) theory of gravity. To obtain the deterministic solutions, some physically plausible conditions like the weak field limit for a point-like source f (R) = R3/2 , the very well known expansion-shear scalar proportionality relation and the special form of an average scale factor are taken into account. Furthermore, we have calculated some physical and kinematical parameters along with the energy conditions to study the astrophysical implications of the constructed model and discussed their graphical behaviour, which shows good similarity with recent observational data.
期刊介绍:
Astrophysics (Ap) is a peer-reviewed scientific journal which publishes research in theoretical and observational astrophysics. Founded by V.A.Ambartsumian in 1965 Astrophysics is one of the international astronomy journals. The journal covers space astrophysics, stellar and galactic evolution, solar physics, stellar and planetary atmospheres, interstellar matter. Additional subjects include chemical composition and internal structure of stars, quasars and pulsars, developments in modern cosmology and radiative transfer.