论文标题
加速Bianchi类型的深色能量宇宙学模型,带有F(t)重力中的宇宙弦
Accelerating bianchi type dark energy cosmological model with cosmic string in f(T) Gravity
论文作者
论文摘要
在本文中,我们研究了两种非相互作用的流体的各向异性加速bianchi cosmological模型的某些特征,即,一种通常的弦乐和其他暗能量流体,用于$ f(t)$ pravity的线性形式的引力场方程,where \ textit {where \ textit {textiT {textiT {t t is t is t is t is torsion tor torsion。为了实现现场方程的物理现实解决方案,我们认为确切的物质主导了体积幂定律的扩展。借助解决方案讨论了派生模型的各个方面,并使该模型在后期变成平坦的宇宙。同样,观察到该模型最初具有非单一和稳定,而整个扩展是不稳定的。在最初的扩展时,$ 0.01 \ le t \ le 0.05 $当宇宙开始扩展到无限扩展$ t> 1.73 $(从宇宙时间$ 0.06 \ le t \ le t \ le 1.73 $)中脱颖而出时,就有一个元素为主导的时代,而$ 0.06 \ le t \ le t \ le t \ le t \ le 1.73 $ 1.73 $ 1.73 $ ITICES AREANCE SARES AREANCE SANES AREANCE SARES AREACTESS AREANCE SATES AREANCE SATES nates naters and Quintence。同样,该弦存在于早期的宇宙中,该宇宙与CMBR数据的约束一致,但是随着扩展宇宙的弦阶段消失,即我们具有颗粒的各向异性流体。
In this paper, we have investigated some features of anisotropic accelerating Bianchi type-I cosmological model in the presence of two non-interacting fluids, i.e. one usual string and other dark energy fluid towards the gravitational field equations for the linear form of $f(T)$ gravity, where \textit{T }be the torsion. To achieve a physically realistic solution of the field equations, we have considered an exact matter dominated volumetric power law expansion. The aspects of derived model are discussed with the help of solution and make the model at late times turn out to be flat Universe. Also, observed that the model has initially non-singular and stable while for whole expansion it is unstable. At an initial expansion $0.01\le t\le 0.05$ when the Universe start to expand to infinite expansion $t>1.73$ (break away from for small interval of cosmic time $0.06\le t\le 1.73$), there is a matter dominated era while for $0.06\le t\le 1.73$ it approaches the quintessence region. Also, the string exists in the early universe which is in agreement with constraints of CMBR data but with the expansion the string phase of the Universe disappears, i.e. we have an anisotropic fluid of particles.