Astrophysics and Space Science ( IF 1.8 ) Pub Date : 2021-07-30 , DOI: 10.1007/s10509-021-03977-9 A. Y. Shaikh 1 , A. S. Shaikh 2 , K. S. Wankhade 3
We have studied Friedmann–Robertson–Walker (FRW) cosmological models within the presence of General Relativistic Hydrodynamics (GRH) in General Relativity. Exact solutions of the field equations are deduced by considering the special form of the average scale factor considered by Abdussattar and Prajapati (Astrophys. Space Sci. 331:657, 2011), constraining the deceleration parameter and a special form of deceleration parameter by Singh and Debnath (Int. J. Theor. Phys. 48:351, 2009). The value of the deceleration is always negative which represents an inflationary accelerating model of the universe. The cosmic jerk parameter is positive, throughout the entire life of the universe which ensures an accelerated expansion. The Phantom, Chaplygin gas, and Tachyon fields are discussed. The scalar field values of tachyon and phantom increase with time, while the scalar potential values of tachyon and phantom decrease with time.
中文翻译:
非奇异弹跳广义相对论流体动力学宇宙学模型
我们在广义相对论中存在广义相对论流体动力学 (GRH) 的情况下研究了弗里德曼-罗伯逊-沃克 (FRW) 宇宙学模型。通过考虑 Abdussattar 和 Prajapati (Astrophys. Space Sci. 331:657, 2011) 考虑的平均比例因子的特殊形式,Singh 和Debnath (Int. J. Theor. Phys. 48:351, 2009)。减速值始终为负,代表宇宙的膨胀加速模型。在宇宙的整个生命周期中,宇宙混蛋参数都是正的,这确保了加速膨胀。讨论了 Phantom、Chaplygin 气体和 Tachyon 场。快子和幻象的标量场值随时间增加,