| 摘要: |
| 本文主要研究了Rastall 引力理论中Kantowski-Sachs宇宙的尺度因子的各向异性因子δ(t)的演化行为。研究结果表明，当 Rastall 参数是各向异性时，在Kantowski-Sachs宇宙的各向异性因子δ(t)随着时间增加而减小, 且时间足够长时趋于零，即Kantowski-Sachs宇宙可以演化成一个各向同性的闭合的稳定的宇宙。此外, 这个模型中的β参量(即Rastall参数 λ和 λ1的差，λ?λ1)会影响各向异性因子δ(t)的大小。 |
| 关键词: Rastall引力 Rastall引力参数 Kantowski-Sachs宇宙 各向异性因子δ(t) |
| DOI： |
| 分类号:O412.1 |
| 基金项目: |
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| Kantowski-Sachs universe in Rastall gravity |
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FU Linsheng, xiping
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Division of Mathematical and Theoretical Physics, Shanghai Normal University
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| Abstract: |
| This paper investigates the evolution of the anisotropy factor δ (t) in the Kantowski -Sachs universe in the Rastall gravity theory. When the Rastall parameters are anisotropic, The anisotropy factor δ (t) decreases as the time t increases. As t is large enough, the anisotropy factor δ (t) tends to zero. It means the Kantowski-Sachs universe eventually can be an isotropic, closed, and stable universe. In addition, the β parameter in this model (i.e. the difference between the Rastall parameters λ and λ1, λ ? λ1) affects the value of the anisotropy factor δ (t). |
| Key words: Rastall gravity Rastall parameters Kantowski-Sachs universe the anisotropy factor δ (t) |
