New Astronomy ( IF 1.9 ) Pub Date : 2021-06-04 , DOI: 10.1016/j.newast.2021.101634 Vijay Singh , Aroonkumar Beesham
A spatially homogeneous and anisotropic locally-rotationally-symmetric Bianchi type-I spacetime model with strange quark matter (SQM) and a variable cosmological term is studied in theory. The exact solutions are obtained for a particular form of under the law of variable deceleration parameter proposed by Banerjee et al (2005). The model presents a cosmological scenario of transition from early deceleration to late time acceleration. In the absence of gravity and SQM, accelerates the universe. In a specific case when vanishes at late times, the SQM accelerates the universe, even in the absence of gravity. The model shows the possibility that SQM could be an alternative to dark energy. The physical viability of the model costs the observational inconsistency.
中文翻译:
LRS Bianchi I 用奇异夸克物质和 Λ( t )建模 重力
具有奇异夸克物质 (SQM) 和可变宇宙学项的空间均匀和各向异性局部旋转对称 Bianchi I 型时空模型 在学习 理论。得到特定形式的精确解根据 Banerjee 等人 (2005) 提出的可变减速参数定律。该模型呈现了从早期减速到晚期加速过渡的宇宙学情景。在缺少...之下 重力和 SQM, 加速宇宙。在特定情况下,当 在后期消失,SQM 加速宇宙,即使在没有 重力。该模型显示了 SQM 可以替代暗能量的可能性。模型的物理可行性会导致观测不一致。