f(R,T) 引力下的 FLRW 穿越宇宙学模型

IF 2.5 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Universe Pub Date : 2024-06-24 DOI:10.3390/universe10070272

Vijay Singh, Siwaphiwe Jokweni, Aroonkumar Beesham

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引用次数: 0

摘要

在f(R,T)引力（其中R为利玛窦标量，T为能动张量的迹线）下，探索了一个所有曲率k=0,±1的弗里德曼-勒梅特尔-罗伯逊-沃克时空模型。解是通过尺度因子的参数化得到的，它导致了一个从减速宇宙过渡到加速宇宙的模型。研究详细讨论和分析了该模型的物理特征。研究表明，f(R,T)引力可以很好地替代暗能量的假想候选者来描述当前宇宙的加速膨胀。

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FLRW Transit Cosmological Model in f(R,T) Gravity

A Friedmann–Lemaitre–Robertson–Walker space–time model with all curvatures k=0,±1 is explored in f(R,T) gravity, where R is the Ricci scalar, and T is the trace of the energy–momentum tensor. The solutions are obtained via the parametrization of the scale factor that leads to a model transiting from a decelerated universe to an accelerating one. The physical features of the model are discussed and analyzed in detail. The study shows that f(R,T) gravity can be a good alternative to the hypothetical candidates of dark energy to describe the present accelerating expansion of the universe.

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来源期刊

Universe Physics and Astronomy-General Physics and Astronomy

CiteScore

4.30

自引率

17.20%

发文量

562

审稿时长

24.38 days

期刊介绍： Universe (ISSN 2218-1997) is an international peer-reviewed open access journal focused on fundamental principles in physics. It publishes reviews, research papers, communications, conference reports and short notes. Our aim is to encourage scientists to publish their research results in as much detail as possible. There is no restriction on the length of the papers.